Question

An $AC$ supply gives 30 Vrms which is fed on a pure resistance of $10 \,ohm$. The power dissipated:

• A. 90 watt
• B. 45 watt
• C. 90 : 2 watt
• D. 180 watt

Answer 1

Answer: (A)

90 watt

Answer 2

$P=\frac{V^{2}}{R}=\frac{(30)^{2}}{10}=90$ watt