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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
a) Which of these circuits will let her measure the current in the circuit and the potential difference (voltage) across the lamp?
Answer
To determine which circuit allows for measuring both current and voltage:
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Understanding Current and Voltage Measurement:
- To measure current (I), an ammeter should be placed in series with the lamp.
- To measure voltage (V), a voltmeter should be connected across the lamp in parallel.
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Analyzing Each Circuit:
- Circuit A: The ammeter is in series with the lamp, and the voltmeter is placed parallel to the lamp. This setup is appropriate.
- Circuit B: Similar to Circuit A, this also allows for measuring both current and voltage.
- Circuit C: The configuration here has the ammeter not positioned correctly to measure the current through the lamp.
- Circuit D: This structure is similar to Circuit C, failing to correctly measure either parameter.
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Conclusion:
- Circuits A and B are suitable for measuring both current and voltage. The student should put a cross in the boxes for both A and B.