If power factor =1 power dissipation in the circuit will be:

Explanation

In an AC circuit, the power factor is a measure of how effectively the current is being converted into useful work. A power factor of 1 means that the circuit is purely resistive and there is no reactive power, leading to maximum power dissipation. In this scenario, all the power supplied is being used effectively, which means the circuit is dissipating maximum power (Option A). Option B is incorrect because it suggests uncertainty in power dissipation, which is not the case with a power factor of 1. Option C is incorrect because it states no power dissipation, contrary to the definition of a power factor of 1. Option D is incorrect as there is a valid answer provided.