AIIMS 2014 Physics Capillary Action MCQ Question
Assertion When height of a tube is less than liquid rise in the capillary tube, the liquid does not overflow.
If both the assertion and reason are true and reason explains the assertion.
If both the assertion and reason are true but reason does not explain the assertion.
If assertion is true but reason false
If assertion is false but reason is true
Correct Answer
Detailed Explanation
The assertion is true because when the height of a capillary tube is less than the height to which the liquid would rise due to capillary action, the liquid remains contained within the tube without overflowing. This is due to the balance between adhesive forces (between the liquid and the tube) and cohesive forces (within the liquid), which allows the liquid to rise to a certain height without spilling over when the tube's height is less than this critical height. Thus, both the assertion and reason are true, and the reason explains the assertion, making option A the correct answer.
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