Physics 9702 · AS & A Level · Resistance and resistivity

Resistance and resistivity — practice question

A thermistor’s resistance varies with temperature, whereas the resistance of a light-dependent resistor (LDR) varies with the illumination. In what conditions will both the thermistor and the LDR have their greatest resistance?

  • Athermistor: highest temperature; LDR: highest illumination
  • Bthermistor: highest temperature; LDR: lowest illumination
  • Cthermistor: lowest temperature; LDR: highest illumination
  • Dthermistor: lowest temperature; LDR: lowest illumination

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