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If you connect a 100 ohm resistor across 120 volts it will draw 1.2 amps, amps = E/R. Power = volts x amps so the power required for the resistor would be 120 x 1.2 = 144 watts.

It would not matter if the 120 volt circuit already has 2 amps load on it by something else to calculate the wattage of the resistor.

The total power on this circuit would be the 144 watts from the resistor and 240 watts from the other 2 amp load (2a x 120v) for a total of 384 watts.

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14y ago

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