Question

Give reasons for the following statement.
The bore of the capillary tube is narrow in a thermometer.

Answer 1

1. The bore of the capillary tube is narrow.
2. It makes the thermometer more sensitive.
3. Because of the narrow bore of the capillary tube, even a small expansion in mercury will lead to a big change in the length of the mercury column.
   Hence, the bore of the capillary tube is narrow in a thermometer.