Physicseasy · Past Paper
Which of the following correctly relates Power (P), Voltage (V) and Resistance (R)?
AP = V^2 * R
BP = V^2 / R
CP = R^2 / V
DP = V * R^2
✓ Correct Answer: B — P = V^2 / R
From P = VI and I = V/R, substituting I gives P = V * (V/R) = V^2/R.
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