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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
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B
0.5
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C
1
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D
5
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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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