A device uses 2 W idle and 6 W active. If usage is 50% active and 50% idle, what is the average wattage?

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Study for the ATandT Information Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

A device uses 2 W idle and 6 W active. If usage is 50% active and 50% idle, what is the average wattage?

Explanation:
Power averages over time by weighting each state by how long it lasts. With half the time idle at 2 W and half the time active at 6 W, the average power is the simple average of the two: (2 W + 6 W) / 2 = 4 W. So the device’s average wattage is 4 watts.

Power averages over time by weighting each state by how long it lasts. With half the time idle at 2 W and half the time active at 6 W, the average power is the simple average of the two: (2 W + 6 W) / 2 = 4 W. So the device’s average wattage is 4 watts.

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