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QAIPM-2012-Ph-1761: NEET 2012 Physics - Class 12 AIPM-2012-Ph-1761 Solution: If voltage across a bulb rated 220 volt-100 watt drops by 2.5%…
If voltage across a bulb rated 220 volt-100 watt drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is
Multiple Choice Options
- A 20%
- B 2.50%
- C 5%
- D 10%
Step-by-Step Verified Solution
Resistance of bulb is constant
P = V 2 R _ _ p p = 2 _ V V + _ R R
_ _ p p = 2 _ 2.5 + 0 = 5 %