Lesson 2 of 4 · Form 3 Physics
Current electricity
20 min
Ohm's law
At constant temperature, current through a metallic conductor is proportional to the potential difference.
V = IR (volts = amperes × ohms)
Resistors in series
- Same current through each.
- R = R₁ + R₂ + R₃
Resistors in parallel
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