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Question

- Spherical bulb thermometer
- either
- Cylindrical bulb thermometer
- both equally

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Solution

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1. The flow of heat is proportional to the surface area or area of cross-section.

2. We know that, the surface area of a cylindrical bulb is more than that of spherical surface.

3. Therefore, the thermometer with cylindrical bulb responds more quickly to temperature change than the thermometer with spherical bulb.

Hece A is the correct option

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