Question

In an ac circuit with voltage v and current i the power dissipated is

Answer 1

In an A.C circuit with phase voltage V and current I, the power dissipated is VI which is the first option.

Answer 2

Power Rule: P = I × V

If a current I flows through through a given element in your circuit, losing voltage V in the process, then the power dissipated by that circuit element is the product of that current and voltage: P = I × V.