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Question
How will you prove experimentally that graphite is a good conductor of electricity?
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Solution
- Objective: To prove that graphite is a conductor of electricity.
- Materials: Pencil, conductive wire, battery/cell, small bulb.
- Action: Sharpen the pencil on both sides. Now, connect the two ends of the pencil with electrical wires. Connect one end of the wire to the cell/battery and the other end to the small bulb. Connect the other side of the bulb and the other side of the battery with another short wire. Start the current in the circuit and observe.
- Diagram:
An electric current flows through the graphite. - Observation: An electric bulb in the circuit lights up.
- Inference/Conclusion: This experiment proves that graphite in pencil is a good conductor of electricity.
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