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Figure. Shows two air filled bulbs conne...


Figure. Shows two air filled bulbs connected by a U-tube partly filled with alcohol. What happens to the levels of alcohol in the limbs X and Y when an electric bulb placed midway between the bulbs is lighted?

A

The level of alcohol in limb X falls while that in limb Y rises

B

The level of alcohol in limb X rises while that in limb Y falls

C

The level of alcohol falls in both limbs

D

There is no change in the levels of alcohol in either of the two limbs

Text Solution

Verified by Experts

The correct Answer is:
A
Black bulb absorbs more heat in comparison with painted bulb. So air in black bulb expands more. Hence the level of alcohol in limb X falls while that in limb Y rises.
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