If a current of 3 amperes flowing in the primary coil is reduced to zero in 0.001second, then the induced e.m.f in the secondary coil is 15000 volts. The mutual inductance between the two coils is

The mutual inductance of an induction coil is 5 H. In the primary coil, the current reduces from 5 A to zero in $10^{- 3} s$ . What is the induced e.m.f. in the secondary coil?

Join BYJU'S Learning Program

The coefficient of mutual inductance of the two coils is 5H. The current through the primary coil is reduced to zero value from 3A in 1millisecond. The induced emf in the secondary coils is

The correct option is D 15KVFlux linking the secondary coil due to current in primary =Mi1 induced emf in the secondary coils = rate of change of flux=M△i1△t=5×3−00.001=15kV

The coefficient of mutual inductance of the two coils is $5 H$ . The current through the primary coil is reduced to zero value from $3 A$ in $1$ millisecond. The induced emf in the secondary coils is

The correct option is D $15 K V$
Flux linking the secondary coil due to current in primary $= M i_{1}$

induced emf in the secondary coils $=$ rate of change of flux

$= M \frac{△ i_{1}}{△ t}$
$= 5 \times \frac{3 - 0}{0.001}$
$= 15 k V$