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  4. A square loop of side 22cm is changed to a circle in time 0.4 sec with its plane normal to a inagnetic field 0.2T. The emf induced is

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Q. A square loop of side 22cm is changed to a circle in time 0.4 sec with its plane normal to a inagnetic field 0.2T. The emf induced is

Electromagnetic Induction

Solution:

$e = - B \frac{\Delta A}{\Delta t}$