Question

A coil having $$500$$ square loops each of the side $$10$$ cm is placed normal to a magnetic field which increases at a rate of $$1 T/s$$. The induced e.m.f. in volts is

A
0.1
B
0.5
C
1
D
5

Solution

The correct option is D $$5$$$$emf=\dfrac { d\Phi }{ dt }$$$$=\dfrac { dnBA }{ dt } =nA\dfrac { dB }{ dt }$$$$=500\times { 0.1 }^{ 2 }\times 1=5V$$Physics

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