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What is the principle behind a thermometer?

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Question: What is the principle behind a thermometer?

Options:

  1. Expansion of liquid with temperature
  2. Contraction of gas with temperature
  3. Change in color with temperature
  4. Change in pressure with temperature

Correct Answer: Expansion of liquid with temperature

Solution: 

Thermometers work on the principle of expansion of liquid (like mercury) with temperature.

What is the principle behind a thermometer?

Practice Questions

Q1
What is the principle behind a thermometer?
  1. Expansion of liquid with temperature
  2. Contraction of gas with temperature
  3. Change in color with temperature
  4. Change in pressure with temperature

Questions & Step-by-Step Solutions

What is the principle behind a thermometer?
Correct Answer: Thermometers work on the principle of expansion of liquid (like mercury) with temperature.
  • Step 1: Understand that a thermometer measures temperature.
  • Step 2: Know that temperature is related to how fast particles move in a substance.
  • Step 3: Learn that when a liquid (like mercury) gets warmer, it expands and takes up more space.
  • Step 4: Realize that the thermometer has a scale that shows the temperature based on how much the liquid expands.
  • Step 5: Remember that when the temperature goes down, the liquid contracts and takes up less space.
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