Electrical power Physics: AQA GCSE (9-1)

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13 Terms

1
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Electrical power

The amount of energy transferred by an electrical appliance each second

<p>The amount of energy transferred by an electrical appliance each second</p>
2
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Two things the amount of energy an appliance transfers depends on

How long the appliance is switched on for and the power of the appliance

3
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P = E/t

The equation linking power, energy transferred and time

<p>The equation linking power, energy transferred and time</p>
4
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One watt is equal to

The power when one joule of energy is transferred in one second (1 W = 1 J/s)

<p>The power when one joule of energy is transferred in one second (1 W = 1 J/s)</p>
5
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E = IVt

The equation linking energy transferred, current, potential difference and time

<p>The equation linking energy transferred, current, potential difference and time</p>
6
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230 V

The potential difference of mains electricity and electrical appliances

<p>The potential difference of mains electricity and electrical appliances</p>
7
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Power rating

The power of an electrical appliance; usually given watts (W) or kilowatts (kW)

<p>The power of an electrical appliance; usually given watts (W) or kilowatts (kW)</p>
8
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Watts (W)

The SI unit for power

<p>The SI unit for power</p>
9
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One kilowatt (kW) is equal to _____ watts (W)

1000 watts (W)

<p>1000 watts (W)</p>
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Seconds (s)

The SI unit for time

<p>The SI unit for time</p>
11
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One hour (h) is equal to _____ seconds (s)

3,600 seconds (s)

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Kilowatt-hour (kWh)

The unit used for energy transferred when power is in kilowatts and time is in hours (electricity is charged per kWh)

<p>The unit used for energy transferred when power is in kilowatts and time is in hours (electricity is charged per kWh)</p>
13
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One kilowatt-hour (kWh) is equal to _____ joules (J)

3,600,000 joules (J)