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AQA · GCSE · Physics · Higher

Connecting Meters in an LED Circuit

Q03.1 2 marks

A student investigated how the current in a red LED varies with the potential difference across the LED. Figure 3 shows an incomplete diagram of the circuit used.

Complete Figure 3 to show how the student should have connected a voltmeter and an ammeter into the circuit.

Use the correct circuit symbols.

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Marking points

  1. 1 Adds a correctly symbolised voltmeter in parallel across the LED.
  2. 2 Adds a correctly symbolised ammeter in series with the LED.

Why this answer loses marks

Connects the voltmeter in series or the ammeter across the LED.

The voltmeter must be connected across the LED, while the ammeter must be in series with it.