(a)[2]
Draw the circuit diagram in the space provided below.
(b)[2]
Explain briefly how the student performs the investigation.
(c)[1]
Explain how the student can use the readings to reach a conclusion.
Physics 5054 · O Level · Resistance
Resistance — practice question
A student is examining how the resistance of a wire changes as its length changes.
He uses the equation $R = \frac{V}{I}$.
The equipment provided is: power supply, ammeter, voltmeter, switch, connecting leads and crocodile clips, a length of resistance wire, metre rule, wire cutters.
Write a plan for the investigation.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The wire, ammeter and power supply should be connected in series; the voltmeter should be connected in parallel across the wire” …
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