Describe a simple expirement to differentiate good conductors from bad conductors?

Make a simple circuit with a bulb, connecting wires and a cell with an empty space to check the conductivity of material. To do this experiment you will need:

1. Connecting wires

2. Bulb

3. Two cell battery

4. Iron nails

5. Materials to check good or bad conductor of electricity

Make the circuit as shown in the following figure:

Place the material between the A and B end and if the material is conducting the bulb will glow otherwise it do not.

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