In a transformer, the coefficient of mutual inductance between th… - Vidyadip

MCQ

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......$V$

A
$5$
✓
$1$
C
$25$
D
$10$

✓

Answer

Correct option: B.

$1$

b
(b) $e = M\frac{{di}}{{dt}} = 0.2 \times 5 = 1\;V$

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