Question

When a current of 2 A is passed through a coil of 100 turns , flux associated with it is `5 xx 10^(-5) `Wb. Find the self inductance of the coil.
A. `4 xx 10^(-2) H`
B. `2.5 xx 10^(-3) H`
C. `10^(-3) H`
D. `4 xx 10^(-3) H`

Answer 1

Correct Answer - B
The flux associated with the coil = `n phi and n phi = LI`
`:. L = (n phi)/(I) = (100 xx 5 xx 10^(-5))/(2) = 2.5 xx 10^(-3)H`.