A student sets up an experiment to measure the potential difference (voltage) across a filament lamp. She changes the current through the lamp. The diagram shows the circuit she used. Complete the sentences by putting a cross (✖) in the box next to your answer. (i) The component X in the circuit diagram is a A diode B fixed resistor C thermistor D variable resistor (ii) The meter that measures potential difference is A in parallel with the power supply B in parallel with the lamp C in series with the lamp D in series with the component X

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A student sets up an experiment to measure the potential difference (voltage) across a filament lamp - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1

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A student sets up an experiment to measure the potential difference (voltage) across a filament lamp. She changes the current through the lamp. The diagram shows t... show full transcript

Worked Solution & Example Answer:A student sets up an experiment to measure the potential difference (voltage) across a filament lamp - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1

Step 1

The component X in the circuit diagram is a

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Answer

In the circuit diagram, component X is a variable resistor (D). A variable resistor is commonly used to adjust the current flowing through the circuit, thereby allowing for measurements of potential difference across the filament lamp.

Step 2

The meter that measures potential difference is

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Answer

The meter that measures potential difference should be in parallel with the lamp (B). Connecting the voltmeter in parallel allows it to accurately measure the potential difference across the lamp without affecting the current flowing through it.

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A student sets up an experiment to measure the potential difference (voltage) across a filament lamp - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1

Worked Solution & Example Answer:A student sets up an experiment to measure the potential difference (voltage) across a filament lamp - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1

The component X in the circuit diagram is a

The meter that measures potential difference is

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