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Two resistors in series, one 5 ohms and one 2 ohms, with a current of 5 amperes, will have a power dissipation of 175 watts.

Ohm's law: Voltage = current times resistance

E1 = I R1 = (5) (5) = 25 volts

E2 = I R2 = (5) (2) = 10 volts

Power law: Power = current times voltage

P1 = I E1 = (5) (25) = 125 watts

P2 = I E2 = (5) (10) = 50 watts

PT = P1 + P2 = 125 + 50 = 175 watts

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