a potential difference of 220v is applied across a resistance of 440 ohms in an electric appliance calculate the current draw and the heat energy produced in an 20 seconds
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Explanation:
according to ohms law
V = IR
I = V/R
I = 220/440
I = 1/2 A
ENERGY = VIT
E = 220× O.5 × 20
E = 2200 j
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