First slide

Faraday's law of Electromagnetic induction

Question

As shown in the figure, a magnet is moved with fast speed towards a coil at rest. Due to this induced electromotive force, induced current and induced charge in the coil is E, I and Q, respectively. If the speed of the magnet is doubled, then find the incorrect option from the following.

Moderate

A

E increases
B

I increases
C

Q remains same
D

Q increases

Solution

Induced charge doesn't depend upon the speed of magnet.
$dQ = idt = \frac{ε}{R} dt = \frac{dϕ}{R}$

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