Class 12 Exam > Class 12 Questions > A magnet is moved towards the coil (a) quickl...
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A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done is
- a)does not depend on the motion of the magnet.
- b)smaller in case (a)
- c)equal in both cases
- d)larger in case (a)
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A magnet is moved towards the coil (a) quickly and (b) slowly, and the...
A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done is This is because when the magnet is moved quickly, opposing emf induced in the coil will be more.
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Most Upvoted Answer
A magnet is moved towards the coil (a) quickly and (b) slowly, and the...
According to Faraday's Law: E=dt/dϕ,if the magnet moves quickly, the rate of change of flux is also higher, hence the EMF induced would belarger in case (a) compared to case (b).so, op D.
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Community Answer
A magnet is moved towards the coil (a) quickly and (b) slowly, and the...
Explanation:
When a magnet is moved towards a coil, it induces an electromotive force (EMF) in the coil according to Faraday's law of electromagnetic induction. The work done in this process is the energy transferred to the coil.
(a) Quickly moving the magnet towards the coil:
When the magnet is moved quickly towards the coil, the change in magnetic field is rapid, resulting in a larger rate of change of magnetic flux through the coil. According to Faraday's law, the induced EMF is directly proportional to the rate of change of magnetic flux. Therefore, a larger induced EMF is produced when the magnet is moved quickly.
The work done in moving the magnet quickly towards the coil is given by the product of the induced EMF and the charge transferred. Since the induced EMF is larger in this case, the work done is also larger.
(b) Slowly moving the magnet towards the coil:
When the magnet is moved slowly towards the coil, the change in magnetic field is gradual, resulting in a smaller rate of change of magnetic flux through the coil. As a result, the induced EMF is smaller compared to the case when the magnet is moved quickly.
The work done in moving the magnet slowly towards the coil is given by the product of the induced EMF and the charge transferred. Since the induced EMF is smaller in this case, the work done is also smaller.
Comparison:
Comparing the two cases:
- When the magnet is moved quickly towards the coil, the induced EMF and the work done are both larger.
- When the magnet is moved slowly towards the coil, the induced EMF and the work done are both smaller.
Therefore, the work done in case (a) (quickly moving the magnet towards the coil) is larger than the work done in case (b) (slowly moving the magnet towards the coil).
Hence, the correct answer is option 'D' - larger in case (a).
When a magnet is moved towards a coil, it induces an electromotive force (EMF) in the coil according to Faraday's law of electromagnetic induction. The work done in this process is the energy transferred to the coil.
(a) Quickly moving the magnet towards the coil:
When the magnet is moved quickly towards the coil, the change in magnetic field is rapid, resulting in a larger rate of change of magnetic flux through the coil. According to Faraday's law, the induced EMF is directly proportional to the rate of change of magnetic flux. Therefore, a larger induced EMF is produced when the magnet is moved quickly.
The work done in moving the magnet quickly towards the coil is given by the product of the induced EMF and the charge transferred. Since the induced EMF is larger in this case, the work done is also larger.
(b) Slowly moving the magnet towards the coil:
When the magnet is moved slowly towards the coil, the change in magnetic field is gradual, resulting in a smaller rate of change of magnetic flux through the coil. As a result, the induced EMF is smaller compared to the case when the magnet is moved quickly.
The work done in moving the magnet slowly towards the coil is given by the product of the induced EMF and the charge transferred. Since the induced EMF is smaller in this case, the work done is also smaller.
Comparison:
Comparing the two cases:
- When the magnet is moved quickly towards the coil, the induced EMF and the work done are both larger.
- When the magnet is moved slowly towards the coil, the induced EMF and the work done are both smaller.
Therefore, the work done in case (a) (quickly moving the magnet towards the coil) is larger than the work done in case (b) (slowly moving the magnet towards the coil).
Hence, the correct answer is option 'D' - larger in case (a).
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A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done isa)does not depend on the motion of the magnet.b)smaller in case (a)c)equal in both casesd)larger in case (a)Correct answer is option 'D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done isa)does not depend on the motion of the magnet.b)smaller in case (a)c)equal in both casesd)larger in case (a)Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done isa)does not depend on the motion of the magnet.b)smaller in case (a)c)equal in both casesd)larger in case (a)Correct answer is option 'D'. Can you explain this answer?.
A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done isa)does not depend on the motion of the magnet.b)smaller in case (a)c)equal in both casesd)larger in case (a)Correct answer is option 'D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done isa)does not depend on the motion of the magnet.b)smaller in case (a)c)equal in both casesd)larger in case (a)Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done isa)does not depend on the motion of the magnet.b)smaller in case (a)c)equal in both casesd)larger in case (a)Correct answer is option 'D'. Can you explain this answer?.
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A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done isa)does not depend on the motion of the magnet.b)smaller in case (a)c)equal in both casesd)larger in case (a)Correct answer is option 'D'. Can you explain this answer?, a detailed solution for A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done isa)does not depend on the motion of the magnet.b)smaller in case (a)c)equal in both casesd)larger in case (a)Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of A magnet is moved towards the coil (a) quickly and (b) slowly, and then the work done isa)does not depend on the motion of the magnet.b)smaller in case (a)c)equal in both casesd)larger in case (a)Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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