A 100 Hz a.c. is flowing in a coil of inductance 10 mH. What is the reactance of the coil ?

Explanation

Here `L = 10 mH = 10 xx 10^(-3) H = 10^(-2)H`
`v = 100 Hz`
Using `X_(L) = L omega = L xx 2pi v`, we get
`X_(L) = 10^(-2) xx 2 xx 3.14 xx 100 = 6.28 Omega`.