A-LevelPhysicsD.C. circuits9702/12 · Feb/Mar 2016 · Q361 Mark
In deriving a formula for the combined resistance of three different resistors in series, Kirchhoff's laws are used. Which physics principle is involved in this derivation?
Athe conservation of charge
Bthe direction of the flow of charge is from negative to positive
Cthe potential difference across each resistor is the same
Dthe current varies in each resistor, in proportion to the resistor value
✓ Correct answer
A: the conservation of charge
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