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For a coil having L = 2 mH, current flow through it is I = t^2e^-t then, the time at which emf become zero

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For a coil having L = 2 mH, current flow through it is I = t2e-t then, the time at which emf become zero

(a) 2 sec

(b) 1 sec

(c) 4 sec

(d) 3 sec

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Correct option  (a) 2 sec

Explanation:

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