First slide

Inductance

Question

The inductance of a coil is $60 μH .$ A current in this coil increases from 1.0 A to 1.5 A in 0.1 s. The magnitude of the induced e.m.f. is

Moderate

A

$60 \times 10^{- 6} V$
B

$300 \times 10^{- 4} V$
C

$30 \times 10^{- 4} V$
D

$3 \times 10^{- 4} V$

Solution

$| e | = L \frac{di}{dt} = 60 \times 10^{- 6} \cdot \frac{(1.5 - 1.0)}{0.1} = 3 \times 10^{- 4} V$

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