If voltage across a bulb rated 220 V, 100 W drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is: [1]
A. 20%
B. 2.5%
C. 5%
D. 10%
Answer:A
If voltage across a bulb rated 220 V, 100 W drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is: [1]
A. 20% B. 2.5% C. 5% D. 10%