1) Which of the following devices opens and closes the circuit? a) fuse b) switch c) dry cell d) metal 2) What supplies energy in an electric circuit? a) a conductor b) a wire c) light bulb d) a battery 3) What needs to be done to this circuit so that the lamp light up? a) Close the switch. b) Add another bulb or lamp. c) Add a battery.  d) Add another wire. 4) The bulb circuit lights up when it is _____________. a) closed b) open c) broken d) none of the above 5) Which is not part of a circuit? a) magnet b) battery c) switch d) wires

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