Modelling Resistance in Parallel Circuits (VCE SSCE Physics): Quizzes

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Modelling Resistance in Parallel Circuits
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What is the defining feature of a parallel circuit?

Junctions where current divides & rejoins

How does voltage behave across components in a parallel circuit?

Voltage is same as supply for all

How do branch currents relate to total current in parallel circuits?

Total current equals sum of branches

Which component carries more current in a parallel circuit?

Component with lower resistance

How does RequivalentR_{equivalent} compare to individual resistors in parallel?

Always smaller than smallest resistor

What is the formula for two resistors in parallel?

Req=R1×R2R1+R2R_{eq} = \frac{R_1 \times R_2}{R_1 + R_2}

What is RequivalentR_{equivalent} for four identical 20 Ω20\,\Omega resistors in parallel?

5 Ω5\,\Omega

Calculate ReqR_{eq} for 3 Ω3\,\Omega and 4 Ω4\,\Omega resistors in parallel.

1.71 Ω1.71\,\Omega

How do you construct a combined I-V graph for parallel circuits?

Fix voltage, add currents

What should voltmeter readings show across parallel resistors?

All readings are equal

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