Question

Briefly explain the working of the maximum and minimum thermometer.

Answer 1

The maximum and minimum thermometer helps to measure the maximum and minimum temperature in a day of a place. It is a U-shaped tube filled with alcohol and mercury. The right tube gives us the maximum temperature while the left tube gives us the minimum temperature. Thus,

• When the temperature increases, the alcohol in the left tube expands. This causes the mercury to move towards the right tube. A metal indice on the right tube also shifts which gives us the maximum temperature for that day.
• When the temperature decreases, the alcohol contracts in the left tube and the mercury moves into the left tube. A metal indice in the left tube shift and give us the minimum temperature of the day.