Home » Power Calculations » 7 » b A 20 ohm resistor carries a current of 0.25 ampere. The power dissipated is:   a.   1.25 watt   b.   5 watt   c.   2.50 watt   d.   10 watt Your answer "b" is not correct. "a" is the right answer. P = I squared x R = 0.25 x 0.25 x 20 = 1.25 watts. Next