electrical power

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5 Terms

1
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Power is defined as

The rate of energy transfer or the amount of energy transferred per second

2
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The power of a device depends on:

  • The voltage of the device

  • The current of the device

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The power of an electrical component (or appliance) is given by the equation:

power = current x voltage

<p>power = current x voltage</p>
4
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unit of power?

watt (W) / joule per second (J/s) (energy per second)

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Calculate the potential difference through a 48 W electric motor with a current of 4 A.

V = P/I so 48 / 4 =12 12V