activity:2 lenz law and right hand grip rule. direction part a. using the illustration below of lenz law label the north(N), south(S) and the direction of the galvonometer pointer.
1. activity:2 lenz law and right hand grip rule. direction part a. using the illustration below of lenz law label the north(N), south(S) and the direction of the galvonometer pointer.
Answer:
1. N
2. S
3. Right
4. S
5. N
6. Right
7. S
8. N
9. left
10. N
11. S
12. left
2. Explain the “minus” of Lenz law.
the answer is I don't now
3. Tungkol san ang Lenz Law?
ANSWER:
Tinutukoy ng Estado ng Florida University ang Batas ni Lenz bilang isang sapilitan na puwersa ng elektromotibo na bumubuo ng isang kasalukuyang na nagpapahiwatig ng isang magnetic field na laban sa magnetic field na bumubuo ng kasalukuyang. Ang Batas ni Lenz ay unang natuklasan ng physicist ng Russia na si Heinrich Lenz noong 1834.
^_^
4. In getting the direction of the current in a loop we use Lenz’s law. In this law, there are strategies in order for it to be easier. Do you believe that having strategies in life can bring you success? Why do you say so?
Answer:
1. Yes, strategies in life can bring to our success because it is generally involves, setting goals and priorities. Which is very important on claiming success.
Hope it helps. Godbless ^_^
5. 3. Which statement about transformers is FALSE?A. A step-down voltage transformer steps up the current.B. Transformers use mutual induction.C.Transformers are an application of Faraday's and Lenz's Laws.D. A transformer can function with either an alternating current (AC)or a steady direct current (DC).4. What transformation can take place in an improvised generator?A. mechanical energy into electrical energyB. electrical energy into mechanical energyC. alternating current into direct currentD.direct current into alternating current5. A loop of conductor lies flat on a horizontal table. A toy magnet ishanging still over it with the magnet's north-seeking pole pointingdown. What happens next?A.The magnet produces a clockwise current in the coil.B.The magnet does not produce any current in the coil.C.The magnet produces an upward electromagnetic current.D.The magnet produces a counterclockwise current in the coil.6. What is the transfer of electricity in a motor?A. electrical to mechanicalB. physical to potentialC. mechanical to electricalD. chemical to mechanical7. What is the transfer of electricity in a generator?A. Electrical to MechanicalB. Physical to PotentialC. Yogurt to LightD. Mechanical to Electrical8. What can you use to make an electromagnet?A. Battery, pencil and wireB. Battery, nail and stringC. Wire, battery and iron ore (nail)D. Peanut butter, lampshade, hand sanitizerrotate inside a coil of9. In large generators in power plants,wire to reduce an electric current.A. WaterB. WindC. MagnetsD. Circuits10. Which device uses mechanical energy to produce electrical energy?A. Solar CellB. GeneratorC. MagnetD. Electric Motor
Answer:
1-5 True 6 false
Explanation:
6. Who discovered electromagnetic induction? a. Heinrich Lenz b. Michael Faraday c. Albert Einstein d. Isaac Newton
MICHAEL FARADAY is generally credited with the discovery of induction in 1831. Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field.
7. Which statement abount tranformer is false? A. A step down voltage transformer step up the current B.Tranformer use mutual induction C.Tranformer are an application of Faradays and lenz law D.A tranformer can function with either an alternating current (ac) or a steady direct current (dc)
Among the four statement about transformer, the statement that is not correct is the statement in letter D.
Explanation:
Transformer, from its word, functions to “transform” voltage from higher to lower or vice versa. Step down transformer decreases high voltage into low voltage. Since it results is to the lower voltage hence, the current is increased. Thus statement A is correct. (see this link https://brainly.ph/question/1394688)
Transformer uses the principle of electromagnetic induction which is govern by Faraday’s and Lenz Law. Thus statement in letter C is correct. (see this link https://brainly.ph/question/103829)
The operation of transformer is through electromagnetic induction which is in the form of mutual induction. Mutual induction is when a coil of wire induces voltage through magnetism into another coil which is close to it. Thus statement in letter B is also correct. (see this link https://brainly.ph/question/424575)
Statement in letter D is not correct because transformer can only use the magnetic flux of AC voltage to operate thus it cannot function with the steady DC voltage.
8. According to lenz’s law the direction of an induced current in a conductor will be that which tends to produce which of the following effects?
Answer:
oppose the effect which produces it
9. The relationship of voltage, current, and resistance is expressed in?A. Lenz LawB. Ohm's LawC. Electrostatics LawD. Law of Conservation of Energy
Answer:
C., because law of electrostatics states that the purity of volate and current is both unequal to the purity of resistance.
Explanation:
Salamat Master
Answer:
B. Ohm's LawExplanation:
Correct me if I'm wrong10. Which of the following laws predicts how a magnetic field will interact with an electric circuit to generate an electromotive force? a. Faraday's law b. Lenz' law c. Kepler's law d. Newton's law
a. Faraday's law!....
11. 12. Which statement about transformers is FALSE?a. A step-down voltage transformer steps up the current.b. Transformers use mutual induction.c. Transformers are an application of Faraday’s and Lenz’s Laws.d. A transformer can function with either an alternating current (AC) or a steady direct current (DC).
Answer:
D. A transformer can function with either an alternating current (AC) or steady direct current (DC).
The transformer should be an electrical component rather an electronic component. It is built so energy from one circuit can transfer to another circuit by means of magnetic coupling. It is a simple static electro-magnetic passive electrical device working on the principle of Faraday's law of induction. Alternating current (AC) creates magnetic flux in the core on the first winding, while inducing the voltage in the others. It can convert high and low voltages. However it cannot convert AC to DC. In Direct current or DC supply, there is no inductance, only resistance will act in the circuit.
AC and DC in electricity:
https://brainly.ph/question/532625
Difference between direct current and alternating current:
https://brainly.ph/question/793690
Advantage of alternating current:
https://brainly.ph/question/2055363
Code: 10.22.2.1
12. To which basic principle of physics is lenz's Law most closely related?
Answer:
Lenz's law is based on the law of conservation of energy. The extra work done is known as electrical energy which is the law of conservation of energy.
13. what law states that a current is directly propotional to the voltageA. Ohm's lawB. lenz's lawC. Kirchoff's lawD. coulomb's law
A. Ohm's law
Ohm's law states that the current through a conductor is directly proportional to the voltage across the conductor. This is true provided the temperature (and other physical factors) remain constant. The constant of proportionality, R is the resistance and has units of ohms, with symbol Ω.
14. 22. A uniform magnetic field is perpendicular to the plane of a wire loop. If the loop accelerates in the direction of the field, will acurrent be induced in the loop?A. No, because magnetic flux through the loop remains constant.B. No, because magnetic flux through the loop changes continuously,C. Yes, because magnetic flux through the loop remains constant,D. Yes, because magnetic flux through the loop changes continuously.23. What is Lenz's law?A. If induced current flows, its direction is such that it adds to the changes which induced it.B. If induced current flows, its direction is such that it opposes the changes which induced itC. If Induced current flows, its direction is always clockwise to the changes which induced it.D. If induced current flows, its direction is always counterclockwise to the changes which induced it.24. What is a voltage transformer?A. A transformer is a device that transforms current to voltage.B. A transformer is a device that transforms voltages from one value to another.C. A transformer is a device that transforms resistance of wire to voltage._25. Why is electric power transmitted at high voltage?A. To increase the current for the transmissionC. To reduce energy loss during transmissionB. To increase resistance during transmissionD. To reduce resistance during transmission_26.. How can you maximize the peak emf (voltage) from a generator?A. The peak emf from a generator can be maximized only by maximizing number of turns.B. The peak emf from a generator can be maximized only by maximizing area of the wired loop.C. The peak emf from a generator can be maximized only by maximizing frequency.D. The peak emf from a generator can be maximized by maximizing number of turns, maximizing area of the wired loop ormaximizing frequency_27. Which of thefollowing describes an electrical generator?A. A generator is powered by electricityC. It must be turned by handB. It converts other sources of power into electrical powerD. It uses magnetism to create electrons28. A step-up fransformer increases theA voltage from power lines for use in homesB. current from the power lines for use in homesC. current from the electrical generator for transmission along power linesD. voltage from the electrical power plant for transmission along power lines29. What would be the effect on the torque of an electric motor of doubling the width of the current loop in the motor?A. Torque remains the same. B. Torque is doubled. C. Torque is quadrupled. D. Torque is halved.30. Why are the coils of a transformer wrapped around a loop of ferrous material?A. The magnetic field from the source coil is trapped and also increased in strength.B. The magnetic field from the source coil is dispersed and also increased in strength.C. The magnetic field from the source coil is trapped and also decreased in strength.D. Magnetic field from the source coil is dispersed and also decreased in strength.31. Which Law states that the induced current is proportional to the change of magnetic flux.A. Lenz B. Faraday'sC. Ampere's32. In 1831, who discovered electromagnetic induction?A. Thomas Edison B. Michael FaradayC. Nikola Tesla33. A magnet can move in a coil of wire to produce electricity in which system?A. GeneratorB. Magnet C. Motor D. Transformer_34. The English scientist, Michael Faraday, was known for its contributions in the field ofA. Electromagnetism B. Electrochemistry C. Electrochemical fieldD. Both A and B_35. Can you produce a current in a wire with a magnet that is sitting still?A. Yes: having a magnet near wire is enough to excite the electrons.B. No: the magnetic field has to be changing to excite the electron.C. No: magnets cannot create electricity36. What would happen if I move a bar magnet in and out of a coil of copper wire?A. Electric current would disappear.C. The magnet will explodeB. Electric current will flow through the wire D. It would produce a gravitational field37. A particle moves through a region of space with a uniform magnetic field of 2.5 T directed along the positive x-axis. The particlehas a velocity of 3.2 x 104 m/s at an angle of 38° with respect to the magnetic field. What is the magnitude of the force on theparticle if its charge is equal to 2.2 x 10-19C?A. 1.08 x 10-14 N B. 1.14 x 10-14 N C. 1.54 x 10-14 N D. 1.60 x 10-14 N38. Which of the following has a minimum wavelength?B. Blue lightC. Infrared raysD. microwave_39. Which of the following is called heat radiation"?A. X-raysC. microwavesD. Infrared radiation40. Which radiation is used in the treatment of muscle ache?A. InfraredB. UltravioletC. MicrowaveD. X-rays41. What type of waves used by artificial satellites for communication?A. MicrowavesB. Infrared wavesC. Radio waves D. X-raysGUYS PATULONG PO ALO PLS
Answer:
C. If Induced current flows, its direction is always clockwise to the changes which induced it
Explanation:
sana makatulong
15. Lenz law is associated with the electromagnetic area,since its approach is based on the relation of changes or tension produced by varations in magnetic flux property from which these variation are presented in a____to the _____ that produces them in honor of its creator lenz law bears his surname the physicist _______ formulated it at the beginning of the ___ century with the aim of _____.
i dont know
kase im boothiful
16. Explain and illustrate faraday's Law lenz's Law of electromagnetic induction?
Answer:
Faraday's laws of electromagnetic induction.
(a) First law : Whenever there is a change in the magnetic flux associated with a circuit, an e.m.f. is induced in the circuit.
(b) Second law : The magnitude of the induced e.m.f. is directly proportional to the time rate of change of magnetic flux through the circuit.
Lenz law : The direction of induced current is such as to oppose the change that produces it
Faraday's law of electromagnetic induction, also known as Faraday's law, is the basic law of electromagnetism which helps us to predict how a magnetic field would interact with an electric circuit to produce an electromotive force (EMF). This phenomenon is known as electromagnetic induction
Explanation:
hopes it helps... correct me if I'm wrong
17. 1. What data could be used to make a conclusion of you stand in front of two adjacent large mirrors at 90° angle? a. There is only one image formed.b. There are two images formed.c. There are three images formed.d. There are three images formed.2. What facts would you select in a convex mirror?I. It will never form a real image.II. An inverted image will be formed if the object distance is greater than the focal lengthIII. An object can be magnified if it is placed at p = 3fA. I only B. II only C. I and II D. I, II, III 3. In which case or cases is electric field present?I. A spark jumping between two nearby rods. II. A charge that is momentarily at rest.III. A rotating bar magnet.A. I only C. II and IIIB. I and I only D. I,II and III4. Which one is true about an electromagnet?A. The electric field surrounding a battery-powered electromagnet alternates constantly.B. The current in the electromagnet coil temporarily magnetizes the iron core.C. The electric field strength is inversely proportional to the current.D. The magnetic field lines produced all straight.5. Why do you think a compass always point north?A. The needle is a magnet and it aligns itself with the Earth's magnetic field B. Earth's South Pole does not have a magnetic pull.C. Earth is a magnet and it attracts all metallic objects towards the north.D. All magnets have a north and south pole.6.What inference can you make when two magnets attract?A. It changes color.B. It gets colder.C. It pulls together.D. It pushes apart.7. As part of a traffic light system, large loops of wire are buried beneath road intersections. What inference can you make about the operation of this traffic light system?A. Vehicles driven over the buried coils activate a traffic light sensor.B. The conducting loops activate a color-dependent field C. The alternating current sent through the buried coils do not produce an electromagnetic field in each coil.D. A minimum number of vehicles over the coils can trigger the traffic light to change red. 8. Which is the best answer that describes transformer?A. step-down voltage transformer increases the current.B. Transformer does not use mutual induction.C. Transformer is an application of Faraday's and Lenz's Laws. D. A transformer can function with either an alternating current (AC) or a steady direct current (DC).9. What idea justifies that a magnetic field is present in a device?A. A charged balloon.B. A cooling soldering iron.C. A very hot horse-shoe magnet.D. A microphone undergoing a sound check.10. Which one uses mechanical energy to produce electrical energy?A. Electric motorB. MagnetC. GeneratorD. Solar Cell11. What could be done to reduce the amount of resistance on a given conductors?A. Increase the length of the wire.B. Increase the temperature.C. Increase the cross-sectional area of the wire.D. Use a higher density of a wire.pakisagot please.nagkamali ako Ng lagay Ng subject.science Po ito
yung sagot ko sa 1 is a po at sa 2 naman po is c
18. 1. What do you call the huge wheel that rotates when pushed by water, wind, or steamA.Magnet B. Motor C.Pipe D.Turbine2. When the plane of the coil is perpendicular to the lines of magnetic force, the number of lines of magnetic force passing through the coil will be A.maximum B.minimum C. zero D. none of the above3. If we grasp a wire with right hand such that the thumb pointed in the direction of current, then the curling fingers of hand will point the A. current C. force acting B. magnetic field D. none of above4. Lenz devised a rule to find out the direction of A. current induced in a circuit C. flow of power in fuse B. electromagnetic difference D. potential difference5. It is made of many loops mounted on a shaft or axleA.armature B.circuit C.fuse D.transformer
Answer:
1. D
2.I don't know sorry
3.C
4.B
5.A
19. 6. Who proposed the left hand rule?A. Lenz B. Faraday C. OerstedD. Fleming7. Who discovered that a current carrying wire caused a nearby magnetized compass needleto deflect?A. Hans Christian OerstedC. Michael Faraday
Answer:
i think c
Explanation:
tell me if aim wrong
20. SpaceC. The magnetic poles are separated.B.XCY1. A bar magnet is divided in two pieces. Which of the following statements is true?A. The bar magnet is demagnetized.B. Two new bar magnets are created.2. A bar magnet is divided in two pieces. Which of the following statements is true about the force between the broken pieces if theyD. The magnetic field of each separated piece becomes stronger.face each other with a small separation?A. There is an electric repulsive force between the broken pieces.B. There is an electric attractive force between the broken pieces.C. There is a magnetic repulsive force between the broken pieces.D. There is a magnetic attractive force between the broken pieces.3. Which of the following is the space around a magnet in which there is a magnetic effect?A. lodestone B. a magnetic fieldC. an electromagnetD. a magnetic pole4. Which of the following materials does not have magnetic properties?A. Nickel B. IronC. Cobalt D. Tin5. In ancient times, what was the name given to the rock that had magnetic properties?A. Gemstone B. LodestoneC. Pyrite D. Brimston6. Like poles of a magneteach other, and unlike poles each other. Which of the following pairs of words correctly fit intothis sentence?A. repel, attract B. attract, repelC. attract, attractD. repel, repel7. Magnetic poles will always occurA. singlyB. in groups of fourC. in threesD. in pairs8. Magnet X can hold a maximum of 5 paper clips, magnet y can hold a maximum of 3 similar paper clips, and magnet Z can hold amaximum of 7 similar paper clips. Which one of the magnets is ine strongest?AZD. They are all equally strong9. What term is used when two magnets come together?A. AttractionB. Friction C. Repulsion D. Opposition10. Which of the following statements is true about magnetic fields?A. They carry electrons from one end of the magnet to the other.B. Magnetic fields exert an attractive force on plastic materialsC. They travel from north to southD. Magnetic field travel from east to west around the earth11. Which of the following devices will you NOT find a magnet?A. Electric motor B. Bicycle dynamo C. Electric bellD. LED flashlight12. Which of the following is responsible for the earth's magnetic field?A. Convective currents in earth's coreC. Rotational motion of earthB. Diversive current in earth's coreD. Transrotational motion of earth13. How does the magnetic compass needle behave in a magnetic field?A. It assures a position right angle to magnetic fieldC. It starts rotatingB. I assures a position which follows a line of magnetic fluxD. None of these14. Which of the following is the point in a magnet where the intensity of magnetic lines of force is maximum?A. magnetic pole B. South poleC. North poleD. unit pole15. Which of the following is the phenomenon by which a magnetic substance becomes a magnet when it is placed near a magnet?A. Magnetic fieldB. Magnetic phenomenonD. Electromagnetic induction16. What do you call a substance that attracts pieces of iron?A. conductorB magnetC. semiconductor D. All of these17. Who demonstrated the theory of electromagnetic induction in 1831?A. Michael FaradayD. Charles CoulombC. James Clerk Maxwell18. Who discovered that a current-carrying conductor would move when placed in a magnetic field?A. Michael FaradayD. Gustav Robert Kirchhoff19. Which law states that the polarity of the induced voltage will oppose the change in magnetic flux causing the induction?A. Joules LawB. Faraday's LawD. Lenz' LawC. Coulomb's LawC. Magnetic inductionB. Andre AmpereB. Andre AmpereC. Hans Christian Oersted20 wli que el the conductor with right hand so that the stretched thumb points in the direction of the current, then encircling fingerswillgive the direction of magnetic lines of force round the conductor. What rule is this?A. Left hand cork screw rule21. How many poles does a magnet have?D. Right hand ruleB. Right hand cork screw rule C. Left hand ruleB.3 C.4 0.5A.2GUYS PATULONG PO AKO PLS LANG PO
A. There is an electric repulsive force between the broken pieces.
Explanation:
sana makatulong
21. 3. What two forces are required for generators and electric motors to work?A magnetism and thermalC. electricity and magnetismB. electricity and thermalD. magnetism and radiant4. What word best fits this definition: A device which converts electrical energy into mechanical energy usuallythrough the rotation of an electromagnet in the field of stationary magnetA. armatureB. electromagnetC. motorD. system5. What is the part of a simple D.C motor that reverses the direction of current through the coil every half-cycle?A the armatureB. the brushesC. the commutator D. slip rings6. In what way is a DC generator different from an AC generator?A. The DC generator is operated by an applied voltageB. ADC generator follow Faraday's law while an AC generator works according to Lenz's lawC. A DC generator creates an electric current that flows in one direction while the current produced in anAC generator flows in two direction alternatelyD. A DC generator creates an electric current that flows in a definite direction while the flow of currentproduced in an AC generator has no definite direction.3
Answer:
1.A2.C3.B4.D5.A6. BExplanation:
THANKYOUSOMUCH22. A magnet is positioned perpendicular to and with one end just above the surface of metal loop as shown in the above figure the bar magnet is pulled rapidly upward, what is the of the current induced in the loop?the position of the magnetic flux and explain using Lenz's Law.
Answer:
The direction of the induced emf drives current around a wire loop to always oppose the change in magnetic flux that causes the emf.
Lenz’s law can also be considered in terms of conservation of energy. If pushing a magnet into a coil causes current, the energy in that current must have come from somewhere. If the induced current causes a magnetic field opposing the increase in field of the magnet we pushed in, then the situation is clear.
23. 1. In what way is a DC generator different from an AC generator?A The DC generator is operated by an applied voltageB. ADC generator follow Faraday's law while an AC generator works according to Lenz'slawC. A DC generator creates an electric current that flows in one direction while the currentproduced in an AC generator flows in two direction alternatelyD. A DC generator creates an electric current that flows in a definite direction while the flowof current produced in an AC generator has no definite direction
a DC generator different from an AC generator: A DC generator creates an electric current that flows in a definite direction while the flow
of current produced in an AC generator has no definite direction.
An AC generator creates an alternating current that periodically reverses direction. But in a DC generator, a direct current flows in one direction. In an AC generator, the coil through which current flows is fixed and the magnet usually moves.The two backup generators are used for different purposes.
Differences in AC and DC GeneratorsAs a tool that is capable of generating electricity and providing balance in its use, it is also important to know the differences that lie in it. In general, the difference between these two generators is in the rotor and stator aspects.
The first type of difference between AC and DC generators is found in the rotor and stator mechanisms. It is important to know in advance that the rotor is a rotating component in the generator, while the stator is a stationary component during rotation.
For generators in AC machines, the magnetic field will be generated by the rotor. Meanwhile, the function of the stator is to produce a conductor to prepare for acceptance of movement by electrons.
In general, the conclusion is that the generator aspect of the AC function of the magnetic field will rotate in the electric coil. Although in general the magnetic field is generated by permanent magnets, in this generator the AC current comes out because there is a magnetic field in it.
Meanwhile, the DC generator has a mechanism that is generally similar to the AC generator. This similarity occurs because the stator in a DC generator functions as a stationary component while the rotor is a moving component.
In essence, the difference between AC and DC generators is in the magnetic performance. If a permanent magnet functions as a stator while an electric coil functions as a rotor. So that this generator can produce electricity in DC, because the coil will rotate in a magnetic field.
Learn more about AC DC generator at https://brainly.ph/question/7149583.
#SPJ6
24. 1. It is a series of continuous electromagnetic waves arranged according to the frequency andwavelength.A. electromagnetic spectrum C. electromagnetic energyB. electromagnetic phenomenon D. All of these2. Which of the following are properties of the EM waves?A. speed of the propagation of the waves and frequencyB. wavelength and visibility of the waves propagatedC. energy carried by the waves and speed of propagationD. Frequency of the waves and wavelength3. The following statements below describe the electromagnetic waves except:A. Electromagnetic waves are formed by the vibrations of electric and magnetic fields.B. The electric and magnetic fields are perpendicular to one another in the direction the wave istravelling.C. Just like the mechanical waves, electromagnetic waves require the presence of a materialmedium in order to transport their energy from one location to another.D. Often, they are called electromagnetic radiation, light, or photons.4. He formulated the principle behind electromagnetic induction,A. Michael Faraday B. Heinrich Hertz C. Heinrich Friedrich Lenz D. James Clerk Maxwell5. Andre Marie Ampere demonstrated the magnetic effect based on which of the following?A. magnitude of magnetic field C. direction of magnetic fluxB. direction of electric current D. speed of vibrating electrons6. To prove that electricity and magnetism are interrelated, Hans Christian Oersted:A. showed how a current-carrying wire behaves like a magnet.B. developed equations that showed the relationship of electricity and magnetism.C. revealed that the phenomenon of electromagnetic induction obeyed the law of conservationof energy.D. showed experimental evidence of electromagnetic waves and their link to light.7. The electromagnetic waves arrange from the longest to the shortest wavelength are the following:A. microwaves, ultraviolet, visible light, gamma raysB. radio waves, infrared, X-rays, microwavesC. gamma rays, ultraviolet, infrared, visible lightD. radio waves, infrared, visible light, X-rays8. Which of the given statements below is true about the electromagnetic wave?A. All EM waves require a medium to travel. C. All EM waves are longitudinal waves.B. All EM waves travel in the same speed. D. All EM waves can pass through barriers.
Answer:
1.electromagnetic spectrum
2. electromagnetic waves have properties of speed, wavelength, and frequency.
3.B
4.A.Michael Faraday
5.D
6.D
7.A
8.C
Explanation:
25. 4. Lenz devised a rule to find out the direction ofA. current induced in a circutB. electromagnetic differenceC. flow of power in fuseD. potential difference5. It is made of many loops mounted on a shaft or axleC. fuseD. transformerB. circuitA armature6. In a practical electric motor, the coil is calledC. poleD. splitB. armatureA arometer7. Electric motor is a device which converts electric energy intoA kinetic energyC. rotational energy1D. rotational kinetic energyB. potential energy
Answer:
4.c 5.c 6.d 6.b
hope it helps
26. 1. A bar magnet passed through a coil of wire. In which case would the induced current in the coil of wire greatest? A. when the magnet moves slowly so that it is inside the coil for a long time B. when the magnet moves fast so that it is inside the coil for a short time C. when the north pole of the magnet enters the coil first D. when the south pole of the magnet enters the coil first 2. What is the nature of the force that is responsible in the operation of a DC motor? A. Electrical B. Magnetic C. Gravitational D. Electric and Magnetic 3. Which of the following device transforms electrical energy to mechanical energy? A. Generator B. Magnet C. Motor D. Transformer 4. A device that transforms mechanical energy to electrical energy A. Generator B. Magnet C. Motor D. Transformer 5. Which of the following law best explains the operation of a transformer? A. Ampere's Law B. Lenz's law C. Faraday's Law D. Law of conservation of enery6. A battery is connected to a lamp by means of a transformer. Current flows out of the battery once the switch is turned on. Which of the following statements is true about the light in the lamp? l. The lamp will never light. II. The lamp will momentarily light when the switch is turned on.lll. The lamp will momentarily light when the switch is turned off.A. l onlyB. ll onlyC. l and llD. ll and lll
Answer:
bdbcdaExplanation:
I hope it helps
27. What can you say about Lenz's Law
Lenz's law, in electromagnetism, statement that an induced electric current flows in a direction such that the current opposes the change that induced it.
28. which statement about transformwr is FALSEA. step down voltage transformwr steps up the currentB. transformers ise mutual inductionC. transformers ate an application of Faradays and Lenz LawsD. a transformers can function with either an alternating current ( AC) or steadily direct current (DC)
D. a transformers can function with either an alternating current ( AC) or steadily direct current (DC)
29. 40. When is magnetic flux at its maximum? a. when the magnetic field is parallel to the cross-section of the coil b. when the magnetic field is perpendicular to C. when the magnetic field forms a 45-degree angle with the cross-section of the coil d. when the magnetic field forms a 90-degree angle with the cross-section of the coil d. ultraviolet rays Lenz's law. the cross-section of the coi
Mechanical energy is needed to rotate the coil of wire located between the pole faces of a permanent magnet. The magnetic flux through the plane of the coil has its maximum value when this plane is perpendicular to the magnetic field lines between the poles.
30. 25. How can you prove that there is a magnetic field in a coil?A. The direction of magnetic field produced by coil can be determined by the right hand grip rule. B. The direction of magnetic field produced by coil can be determined by the left hand rule. C. The direction of magnetic field produced by coil can be determined by the Lenz law. D. The direction of magnetic field produced by coil can be determined by Faraday's law.
Answer:
A. The direction of magnetic field produced by coil can be determined by the right hand grip rule.Explanation:
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