Question

Three loads, with wattages of 100 watts, 250 watts and 60 watts, are connected on a circuit. Determine the total power consumed by the circuit when all loads are operating.

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Answer 1

410 W

Explanation:

You want the total power consumed by loads of 100 W, 250 W, and 60 W.

Total power

The total power being consumed is the sum of the powers consumed by each of the loads:

100W +250W +60W = 410W

The circuit consumes 410 watts.

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Additional comment

You can think of this as though it were light bulbs in your room. The 100W bulb gives off a certain amount of heat; the 250W bulb gives off 2.5 times as much, and the 60W bulb adds to the total heat being generated by the other two. The total heat the bulbs supply to the room is (100 +250 +60)W = 410W.

The topology of the circuit (series or parallel or some combination) is irrelevant. The total power is the sum of the power consumed by each of the loads.