A resonance of `20 Omega` is connected to a source of an alternating potential `V=220 sin (100 pi t)`. The time taken by the current to change from the peak value to rms value is

Options

A. `2.5 xx 10^(-3) s`
B. `25 xx 10^(-3) s`
C. 0.25 s
D. 0.2 s

Answer

A