Answers

2014-10-19T09:06:51+05:30
First take a cardboard.then take a led bulb. now connect the wire to its positive and negative sides. now connect the wires to the battery. then join one wire to one side of the safety pin and another to other side.now if u can use the safety pin as the switch to the circuit.
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2014-10-19T09:07:52+05:30
To make an electric circuit we need  cell ,bulb ,switch,and a conducting wire. connect one end of the wire to the +ve terminal of the cell,then to the switch,then to torcch bulb and other end to the -ve terminal of the cell.switch on the circuit.if the bulb glows,then the electrc circuit is complete.switch is used to control thhe flow of electrons
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