# Topic 2 - Equations

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Equation for Power
Power = Current x Potential Difference (Voltage)
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Equation for Energy
Energy = Current x Potential Difference (Voltage) x time
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Equation for Potential Difference (Voltage)
Potential Difference (Voltage) = Current x Resistance
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Equation for Current
Current = Potential Difference (Voltage) ÷ Resistance
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Equation for Resistance
Resistance = Potential Difference ÷ Current
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What is Power measured in?
Power is measured in Watts (W).
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What is Current measured in?
Current is measured in Amps (A).
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What is Voltage (Potential Difference) measured in?
Voltage (Potential Difference) is measured in Volts (V).
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What is Energy measured in?
Energy is measured in Joules (J).
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What is Time measured in?
Time is measured in Seconds (s).
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What is Resistance measured in?
Resistance is measured in Ohms.
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## Other cards in this set

### Card 2

#### Front

Energy = Current x Potential Difference (Voltage) x time

#### Back

Equation for Energy

### Card 3

#### Front

Potential Difference (Voltage) = Current x Resistance

### Card 4

#### Front

Current = Potential Difference (Voltage) ÷ Resistance

### Card 5

#### Front

Resistance = Potential Difference ÷ Current