Question

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Answer 1

Answer:

Both the expressions ( P = I²/R and P = V²/R) are correct and are used to calculate electric power. The expression P = I²R is used to calculate electric power when the current flowing through the circuit is constant. This is the case when the electric devices are connected in series. The expression P = V²R is used to calculate electric power and when the pd (V) across the circuit is constant. This is the case when electric devices are connected in parallel.

Answer 2

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Answer:

Both the expressions ( P = I²/R and P = V²/R) are correct and are used to calculate electric power. The expression P = I²R is used to calculate electric power when the current flowing through the circuit is constant. This is the case when the electric devices are connected in series. The expression P = V²R is used to calculate electric power and when the pd (V) across the circuit is constant. This is the case when electric devices are connected in parallel.