Questions
If the length of the filament of a heater is reduced by 10%, the power of the heater will
detailed solution
Correct option is B
New resistance: R' = ρ 0.9 LA = 0.9 RP' =V2R' = V0.9 R = P0.9Increase in power: P'−PP× 100 =1009 =11%Talk to our academic expert!
Similar Questions
A resistor R is connected across a battery of emf 12 V. It observed that terminal potential differenceis 9 V and the power delivered to resistor is 18 W. Internal resistance of the battery ‘r’ and the resistance R are respectively
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