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2.1 Current, potential difference and resistance

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Question 3

A circuit used to monitor light levels in a greenhouse has an LDR and a fixed resistor connected in series across a cell. The potential difference of the cell stays constant and no other component is changed. The light intensity on the LDR changes, and the current in the circuit increases. What has happened to the light intensity and to the resistance of the LDR?

[1]
A

The light intensity has decreased and the resistance of the LDR has decreased.

B

The light intensity has decreased and the resistance of the LDR has increased.

C

The light intensity has increased and the resistance of the LDR has decreased.

D

The light intensity has increased and the resistance of the LDR has increased.

Markscheme

2.1 Current, potential difference and resistance Questions

  1. GCSE
  2. /Physics
  3. /2.1 Current, potential difference and resistance

82 exam-style questions on AQA GCSE Physics 2.1 Current, potential difference and resistance, covering 2.1.1 Standard circuit diagram symbols, 2.1.2 Electrical charge and current, 2.1.3 Current, resistance and potential difference, and 2.1.4 Resistors. Each one has a worked solution and a mark scheme showing where the marks go.

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