When the voltage across a certain resistance is V, the power delivered is P.If the voltage is doubled to 2V, the power delivered becomes

Question

Quizplus · Accepted Answer

The power delivered by a resistance is given by the formula P=V^2/R, where V is the voltage across the resistance and R is the resistance value.

When the voltage across the resistance is doubled to 2V, the new power delivered is given by P' = (2V)^2/R = 4V^2/R = 4P.

Therefore, the correct answer is B, which states that the power delivered becomes 4 times the original value, when the voltage is doubled.

When the Voltage Across a Certain Resistance Is V, the Power