Scelta multipla
Power is measured in which unit?
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Power
Scelta multipla
Which of the following is the SI unit of power?
A
(joule)
B
(volt)
C
(newton)
D
(watt)
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Guida verificata passo dopo passo1
Understand that power is defined as the rate at which work is done or energy is transferred over time.
Recall the formula for power: \( P = \frac{W}{t} \), where \(P\) is power, \(W\) is work done (or energy transferred), and \(t\) is time.
Recognize that the SI unit of work or energy is the joule (J), and time is measured in seconds (s).
Therefore, the SI unit of power is joules per second, which is given a special name: the watt (W).
Conclude that among the options joule (J), volt (V), newton (N), and watt (W), the correct SI unit of power is the watt (W).
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