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Activity 3.4 — Electrical Conductivity
NCERT Activity 3.4: Test which materials conduct electricity by placing metal and non-metal samples in an electric circuit.
How To Perform
1
Set Up the Circuit
A battery, bulb, and wires with alligator clips are ready on the bench.
2
Test Metals
Place iron, copper, and aluminium strips between the clips. Watch the bulb glow!
3
Test Non-metals
Place sulphur — the bulb stays off. But graphite may surprise you…
4
Classify & Learn
Why does graphite conduct while other non-metals don't? Answer to find out!
⚠️ Safety Notes
- •Do not touch bare wires while the circuit is connected — risk of electric shock.
- •Ensure the bulb is rated for the battery voltage to avoid burnout.