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 1

answer : option (b) 1V

explanation : coefficient of mutual inductance between primary and secondary, M = 0.2 H

change in current through primary coil, di/dt = 5 A/s

we know, induced emf in the secondary is product of coefficient of mutual inductance and change in current through primary

e.g., $\xi_{in}=M\frac{di}{dt}$

= 0.2 × 5 = 1 V

hence, induced emf in the secondary will be 1V

Answer 2

Answer:

one volt will be the answer

option C

Explanation:

I hope explanation is not required as the above person has explained in detail