Question

An e.m.f. of 5 volt is produced by a self inductance, when the current changes at a steady rate from 3 A to 2 A in 1 millisecond. The value of self inductance is

• A. Zero
• B. 5 H
• C. 5000 H
• D. 5 Mh

Answer 1

Answer: (D)

5 Mh

Answer 2

$L = \frac{e}{di/dt} = \frac{5}{(3 - 2)/10^{- 3}} = \frac{5}{1} \times 10^{- 3} = 5milli\mspace{6mu} henry$