Question
In a transformer, the coefficient of mutual inductance between the primary and the secondary coil is 0.2 henry. When the current changes by 5 ampere/second in the primary, the induced e.m.f. in the secondary will be(a)  5 V    (b) 1 V(c)  25 V  (d) 10 V
       

Answer

(b) 1 V

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