join the free ends of the tester together for a moment. This completes the circuit of the tester and the bulb should glow. However, if the bulb does not glow it means that the tester is not working. Can you think of the possible reasons?
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if the bulb does not glow, it means that either the connections of the circuit are loose or the bulb is fused or cells are used up. If the tester is working, it can be used to test the materials, i.e., whether it is a conductor or non-conductor of electricity.
I am also an army btw :)
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