Q6 of 12 Page 37

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

If 200 Ω is replaced by 100Ω, how much heat will be generated in 5 minutes?

Power =

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


= Power× time


= 400× 300


= 120000 J


= 120 kJ


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