Question
Explain linear expansion with an experiment.
✓
Answer
- The expansion in length is called linear expansion.
- Take a bulb, dry cell, candle, cycle spoke, coin, and two wooden boxes.
- Place one end of the cycle spoke on a wooden block and connect an electric wire to it. Put a stone over the spoke to hold it.
- The other one of the cycle spoke is placed on another wooden block.
- Wrap some electric wire around the coin and place it on the block. Put a stone over the coin to hold it in place.
- Connect bulb and dry cell to the free ends of wires connected to the coin and the spoke and make the circuit.
- When we heat the cycle spoke with a candle the length will expand and touches the coin.
- So the circuit completes, the bulb will glow.
- When we cool the spoke it contracts and does not touch the coin. So the circuit will disconnect, the bulb will not glow.
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→1. $10^{-3}$ is one2. SI Unit of time is
3. Cross view of reading a measurement leads to
4. is the one what a clock reads.
5. is the amount of substance present in an object.
6. can be taken to get the final reading of the recordings of different students for a single measurement.
7. is a fundamental quantity.
8. shows the distance covered by an automobile
9. A tailor uses to take measurements to stitch the cloth.
10. Liquids are measured with this physical quantity.
What are the storage methods of magnets?