How can you make a tester for testing whether a given material

cbse-class-8
science
chemical-effects

#1

How can you make a tester for testing whether a given material is a conductor or an insulator ?
A. A tester can be made by attaching one free end of the wire to a terminal of a battery and another wire from other terminal of the battery to a bulb. The two free ends of wire are connected to the material to be tested.
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