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A student experiments with filament lamps in a circuit - Edexcel - GCSE Physics - Question 4 - 2017 - Paper 1
Question 4
A student experiments with filament lamps in a circuit. She starts with one lamp. Which of these circuits will let her measure the current in the circuit and the p... show full transcript
Worked Solution & Example Answer:A student experiments with filament lamps in a circuit - Edexcel - GCSE Physics - Question 4 - 2017 - Paper 1
Step 1
Identify the correct circuits for measuring current and voltage
Answer
To determine which circuit allows for the measurement of both current and voltage across the lamp, we must ensure that:
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Current Measurement: The ammeter (A) should be connected in series with the lamp. This arrangement allows the ammeter to measure the current flowing through the lamp directly.
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Voltage Measurement: The voltmeter (V) must be connected in parallel with the lamp in order to measure the potential difference across it accurately.
Looking at the provided circuits:
- Circuit A: The ammeter is in series with the lamp, and the voltmeter is across the lamp, which means both current and voltage can be measured here.
- Circuit B: The ammeter is in series, but the voltmeter is not connected across the lamp.
- Circuit C: The ammeter and voltmeter setup does allow current and voltage measurement but lacks appropriate design for clarity.
- Circuit D: Similar issues as Circuit B.
Therefore, the correct answer is Circuit A, as it provides both the necessary current measurement and voltage reading.