Statement I: When height of a tube is less than liquid rise in the capillary tube, the liquid does not overflow.
Statement II: Product of radius of meniscus and height of liquid in capillary tube always remains constant.

Moderate

A

If both statement I and statement II are true and statement II is the correct explanation of statement I.
B

If both statement I and statement II are true but statement II is not the correct explanation of statement I.
C

If statement I is true but statement II is false
D

If both statement I and statement II are false

Solution

$h = \frac{2 T}{Rdg} \Rightarrow hR = \frac{2 T}{dg} ∴ hR = constant$
Hence when the tube is of insufficient length, radius of curvature of the liquid meniscus increases, so as to maintain the product hR a finite constant.
i.e., as h decreases, R increases and the liquid meniscus becomes more and more flat, but the liquid does not overflow.

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