Question

In the circuit shown if the emf of source at an instant is $5V,$ the potential difference across capacitor at the same instant is $4V.$ The potential difference across $R$ at that instant may be

• A. $3V$
• B. $\sqrt{4}1V$
• C. $\frac{3}{\sqrt{2}}V$
• D. $none$

Answer 1

The correct option is B $\sqrt{4}1V$

$\sqrt{5^2+4^2}=\sqrt{25+16}$

$V_{rms}=\sqrt{41}V$