A teacher set up a simple electric circuit consisting of a battery, a bulb, and connecting wires. One by one, different materials were placed in the gap of the circuit to check whether they allowed electric current to pass.
The materials tested were:
- Copper wire
- Iron nail
- Aluminium foil
- Sulfur piece
- Coal piece
- Rubber eraser
- Wooden stick
Depending upon the activity, answer the given questions:
1. What was the main objective of this activity? - .
2. A student replaces the iron nail with a wooden stick. What is the expected observation? - .