Question

Describe a simple experiment to prove that a copper wire conducts electricity, but a piece of coal does not.

Answer 1

Experiment to prove that a copper wire conducts electricity.

Procedure: Join a wire with the battery, copper, and bulb.

Observation: The bulb glows when current passes through the circuit.

Conclusion: Copper conducts electricity, hence it is a good conductor of electricity.

Experiment to prove that coal does not conduct electricity.

Procedure: Join a wire with a battery, coal, and a bulb

Observation: The bulb does not glow.

Conclusion: Coal does not conduct electricity; hence, it is a bad conductor of electricity.