Physics 0625 · IGCSE · Electric circuits

Electric circuits — practice question

A light-dependent resistor (LDR) and a resistor $R$ are arranged in a series circuit. Light is incident on the LDR. The intensity of the light reaching the LDR decreases. What happens to the resistance of the LDR, and what happens to the reading on the ammeter?

  • Aresistance of LDR decreases; reading on ammeter decreases
  • Bresistance of LDR decreases; reading on ammeter increases
  • Cresistance of LDR increases; reading on ammeter decreases
  • Dresistance of LDR increases; reading on ammeter increases

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