Question

A resistor of resistance $1000\Omega$ is connected to an AC source $E=220Vsin(100\pi rad/s$ . the power consumed by resistor is

• A. $48.4W$
• B. $24.2W$
• C. $12.1W$
• D. ZERO

Answer 1

The correct option is A $48.4W$

Given,

$R=1000\Omega$

$E=220Vsin\left(100\pi rad/s\right)$

$E_0=220V$

The power consumed by the resistance will be given by

$P=\frac{E_0^2}{R}$

$P=\frac{220\times 220}{1000}=48.4W$

The correct option is A.