Home » Power Calculations » 20 » d The voltage applied to two resistors in series is doubled. The total power dissipated will:   a.   increase by four times   b.   decrease to half   c.   double   d.   not change Your answer "d" is not correct. "a" is the right answer. Firstly, the 'two resistors in series' words are trying to distract you. P = E squared / R. So the power varies as the square of the voltage. Two squared equals four. Doubling the voltage thus results in four times the power. That was the last question for this topic.