Questions
A magnet is brought towards a coil speedily in the first case and slowly in the second case. Then the induced e.m.f./induced charge will be respectively
detailed solution
Correct option is B
The magnitude of induced e.m.f. is directly proportional to the rate of change of magnetic flux. Induced charge doesn't depend upon time.dQ=i dt=εRdt=dϕRTalk to our academic expert!
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A circular ring, made of copper wire, has area of 30 cm2 and resistance of 10 . It is placed in a uniform magnetic field of induction 2 tesla with its plane perpendicular to the field. When the loop is rotated through an angle of about its diameter, coulomb of charge flows through it. Then is
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