CAIE IGCSE Physics 4.2.4.2 An experiment to determine resistance
Practise choosing the correct ammeter and voltmeter arrangement for finding resistance, then using the measured current and p.d.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- select a circuit with the ammeter in series and voltmeter in parallel with the component
- use measured V and I values from the chosen circuit to determine resistance
4.2.4.2—An experiment to determine resistance question 1
A student is trying to determine the resistance of a lamp. He sets up the incorrect circuit shown.
Which change would allow him to take the measurements needed to calculate the resistance of the lamp?
A
Disconnect the ammeter and move it to the left of the lamp.
B
Swap the positions of the ammeter and the voltmeter in the circuit.
C
Disconnect the ammeter and connect it in parallel with the lamp.
D
Disconnect the voltmeter and connect it in parallel with the lamp.
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