Resistors in Series & Parallel (AQA GCSE Physics): Flashcards

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Resistors in Series & Parallel
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Total resistance formula: series circuit

Rtotal=R1+R2+...R_{total} = R_1 + R_2 + ...

Why does resistance increase in series circuits?

Current must pass through each resistor

Unit for resistance

Ohms (Ω)

Parallel resistance compared to smallest resistor

Always less than smallest

Total resistance formula: parallel circuit

1Rtotal=1R1+1R2+...\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2} + ...

Why do parallel circuits have lower resistance?

Current has multiple paths to take

Effect of adding more parallel resistors

Total resistance decreases

How to calculate series resistance

Sum of individual resistances

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