Electromagnetic Induction - Result Question 7
7. A coil of resistance is placed in a magnetic field. If the magnetic flux (wb) linked with the coil varies with time (sec) as . The current in the coil at is :
[2012]
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 7. (a)
Solution:
- (a) According, to Faraday’s law of induction
Induced e.m.f.
Induced current
The magnetic flux linked with a loop does not change when magnet and loop are moving with the same velocity.