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Physics - Electricity and Ohm's Law (Form III & IV)

English physics form3 form4 electricity ohm current voltage resistance
Muhtasari / Summary: Current, Ohm's Law, series/parallel circuits, and power.
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Electric current (I) is the flow of charge: I = Q/t (Amperes). Ohm's Law: V = IR (Voltage = Current × Resistance). Resistance in Series: R_total = R₁ + R₂ + … Resistance in Parallel: 1/R_total = 1/R₁ + 1/R₂ + … Power: P = VI = I²R = V²/R (Watts). EMF is the energy supplied per unit charge by a source. Kirchhoff's Laws: sum of currents at a junction = 0; sum of EMFs = sum of potential drops in a loop.

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