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A (100 W, 200 V) bulb is connected to a 160V power supply. The power consumption would be
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- 125 W
- 100 W
- 80 W
- 64 W
Correct Option: D
Power = 100 W, Voltage = 200 V
Resistance of bulb
| = | V² | = | 200 x 200 | = 400 Ω |
| P | 100 |
When bulb is applied across 160 V,
Current in bulb = (160/400)A
Power consumption = VI = 160 x (160/400) = 64 W
