Question

A $240V,60Hz$ voltage source is connected to resistor of $60\mathrm{\Omega }$. Find the value of net power consumed by resistance over a complete cycle.

• (A) $0W$
• (B) $1000W$
• (C) $960W$
• (D) $540W$

Answer 1

The Correct Option is C

Explanation:
Given,$V=240V$ and $R=60\mathrm{\Omega }$Power consumed by resistance is given by:$P=V\times I$Current flowing through the circuit is given by,$\Rightarrow I=\frac{V}{R}$$\Rightarrow I=\frac{240}{60}$$I=4A$Net power consumed by resistor$P=240\times 4=960W$Hence, the correct option is (C).