Switches

This task is about how switches in a simple circuit work. To do this task you need to know about circuits and be able to read circuit diagrams.

Question

electric circuit          electric circuit

If switches X and Y are open, as shown, which lamps will be lit?

    • None of the lamps

    • Lamp 4 only

    • Lamps 1, 2 and 3

    • All of the lamps

Question

electric circuit diagram

If you want lamps 1 and 2 in this circuit to light up, what position will the switches be in?

    • Both switches open

    • Both switches closed

    • Switch 1 open, switch 2 closed

    • Switch 2 open, switch 1 closed

Question

electric circuit diagram

If you want only lamp 1 to light up, which switches should be open or closed?

    • Switch 1 open and switch 2 open

    • Switch 1 open, switch 2 closed

    • Switch 1 closed, switch 2 open

    • Switch 1 closed, switch 2 closed