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?

2500 V

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25000 V

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2510 V

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zero

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Solution

The correct option is B 25000 V
$E M F = L \frac{d i}{d t}$
$= 5 \times \frac{5}{10^{- 3}}$
$= 25000 V$

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

The correct option is B 25000 VEMF=Ldidt=5×510−3=25000V

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?

The correct option is B 25000 V
$E M F = L \frac{d i}{d t}$
$= 5 \times \frac{5}{10^{- 3}}$
$= 25000 V$