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Section B: Electricity

Power = Current x Voltage 

Energy = Power x time

Charge = Current x time

Voltage = Current x Resistance

Ohm's Law:

The current that flows through a conductor is directly proportional to the p.d. across its ends. (provided temperature stays constant)

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Section C: Waves

Frequency = 1 / Time Period

Wave Speed (m/s) = Frequency(HzWavelength(m)

Refractive Index = sin i / sin r

sin c = 1 / n

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