Question

An resistance of $20ohm$ is connected to a source of an alternating potential $V=220\sin \left(100\pi \right)$. The time taken by the current to charge from its peak value to r.m.s value is

• A. $0.2\sec$
• B. $0.25\sec$
• C. $25\times {10}^{-3}\sec$
• D. $2.5\times {10}^{-3}\sec$

Answer 1

The correct option is D $2.5\times {10}^{-3}\sec$