Question

The back e.m.f. induced in a coil, when current changes
from 1 ampere to zero in one milli-second, is 4 volts, the
self inductance of the coil is
​

Answer 1

Answer:

4 milli henry

Explanation:

we know

e=-L×di÷dt

4 volts =-L×(1-0)÷1×0·001

 0.001  × 4=-L×1

-L=0.004

-L=4 milli henry