Questions
If resistance of the filament increases with temperature, what will be power dissipated in a lamp when connected to 110 V power supply?
detailed solution
Correct option is C
If resistance does not vary with temperature, power consumed = VAVR2 × PR = 1102202 × 100=25 W. But in second cases resistance decreases, so consumed power will be more than 25 W.Talk to our academic expert!
Similar Questions
Two 1000 W heaters when connected in parallel across 220 V supply produce heat Hp in time t. If they are connected in series across the same power supply, the heat produced in the same time is HS. What is (HP / HS) ?
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