Question

The diagram in the following shows two air filled bulbs connected by a U-tube containing mercury kept equidistant from a glassing bulb.

(i) Explain, how will the level X and Y change? (ii) Give a reason for your answer.

Answer 1

The level Y will rise and level X will drop because the air in blackened bulb is heated more than clear bulb; hence the air expands and pushes the mercury to the other limb.