Physics 9702 · AS & A Level · Practical circuits

Practical circuits — practice question

In the circuit shown, the voltmeter reading $V_T$ falls from high to low when the thermistor’s temperature changes. The voltmeter reading $V_L$ falls from high to low when the light intensity on the light-dependent resistor (LDR) changes. Both readings $V_T$ and $V_L$ are high. What are the temperature and light level conditions?

  • Atemperature low, light level low
  • Btemperature low, light level high
  • Ctemperature high, light level low
  • Dtemperature high, light level high

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