A resistance of `20 Omega` is connected to a source of alternating current rated `110 V, 50 Hz`. Find (a) the `rms` current, (b) the maxium instantaneous current in the resistor and the time taken by the current to change from its maximum value to the rms value.

Options

A. `2.5 xx 10^(-3)sec`
B. `2.5 xx 10^(-2) sec`
C. `5 xx 10^(-3) sec`
D. `25 xx 10^(-3) sec`

Answer

1

Explanation

`E = E_(0) cos omega t, i = i_(0) cos (2 pi ft)` but `i = (i_(0))/(sqrt(2))`