Question

A resistance of $20\Omega$ is connected to a source of alternating current rated $110\text{V},50\text{Hz}$. Find the rms current.

• A. $4.5\text{A}$
• B. $5.5\text{A}$
• C. $6.5\text{A}$
• D. $7.5\text{A}$

Answer 1

The correct option is B $5.5\text{A}$

The voltage rating is given in rms value.

So, $i_{rms}=\frac{E_{rms}}{R}=\frac{110}{20}=5.5\text{A}$