Multiple choice

If a device consumes energy 200 joules within a 4 second time period by providing a voltage of 120 V then calculate the power of the device.

  1. 50 Watts

  2. 800 Watts

  3. 0.02 Watts

  4. 2500 Watts

  5. 10000 Watts
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A Correct answer
Explanation

The power is simply the rate at which energy is supplied to a circuit or transformed by a circuit. In this case, the power is the energy consumed per time. P = (200 J) / (4 seconds) = 50 Watts

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