A potential difference of 220V is applied across a resistance of 440Ω in an electrical 3
appliance. Calculate the current drawn and the heat energy produced in 20 seconds.
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current= V/R= 0.5 A
heat= V×i×t= 220× 1/2×20= 2200J
heat= V×i×t= 220× 1/2×20= 2200J
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