Two circuits have coefficient of mutual induction of 0.09 henry. Average e.m.f. induced in the secondary by a change of current from 0 to 20 amperes in 0.006 second in the primary will be

Question

Two circuits have coefficient of mutual induction of 0.09 henry. Average e.m.f. induced in the secondary by a change of current from 0 to 20 amperes in 0.006 second in the primary will be (A) 120 V (B) 80 V (C) 200 V (D) 300 V

Tardigrade Admin · Accepted Answer

|e|=M (d i/d t)=0.09 × (20/0.006)=300 V

Q. Two circuits have coefficient of mutual induction of $0.09$ henry. Average e.m.f. induced in the secondary by a change of current from 0 to $20$ amperes in $0.006$ second in the primary will be

120 V

80 V

200 V

300 V

$∣ e ∣ = M \frac{d i}{d t} = 0.09 \times \frac{20}{0.006} = 300 V$

Q. Two circuits have coefficient of mutual induction of 0.09 henry. Average e.m.f. induced in the secondary by a change of current from 0 to 20 amperes in 0.006 second in the primary will be