IGCSE Physics Formula's - Electricity and Magnetism
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Current
Charge (Q) / Time (t)
Power
Current (I) x Volts (V)
Total Resistance in Parallel
(R1 x R2) / R1 + R2
Potential Difference
Energy / Electric Charge
Resistance
Potential Difference (V) / Current (I)
Primary Volts / Secondary Volts (Vp/Vs)
Primary turns / Secondary turns (Np/Ns)
Series Resistors
Total Resistance
Energy
Volts (V) x Current (I) x Time (t)
Primary Current x Primary Volts (Ip x Vp)
Secondary Current x Secondary Volts (Is x Vs)
Total Emf
emf1 + emf2 + emf3