Physics 5054 · O Level · Series and parallel circuits

Series and parallel circuits — practice question

In the circuit diagram shown, every lamp is identical. Lamp P shines at normal brightness. Switch Y is closed and the lamps illuminate. Which row shows the brightness of the lamps?

  • AP dim; Q dim; R dim
  • BP normal; Q dim; R dim
  • CP normal; Q off; R off
  • DP off; Q normal; R normal

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