Physics 5054 · O Level · Action and use of circuit components

Action and use of circuit components — practice question

The diagram depicts an LED in a circuit with a resistor and an a.c. power supply of frequency $2.0\,\text{Hz}$. Which statement is correct?

  • AThe LED does not light.
  • BThe LED flashes on twice each second and off twice each second.
  • CThe LED flashes on four times each second and off four times each second.
  • DThe LED stays on all the time.

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