Q6 of 12 Page 37

A potential difference of 200 V is applied at a 200 Ω resistor for 5 minutes.

If 400Ω resistance is used in this place for 5 minutes, how much heat is generated?

Power =

Heat generated in 5 minutes i.e.5× 60 s i.e. 300 s


= Power× time


= 100× 300


= 30000 J


= 30 kJ


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