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Physics-

General

Easy

Question

Shape of the meniscus formed by two liquids when capillaries are dipped in them are shown. In I it is hemispherical where as in II it is flat. Pick correct statement regarding contact angles formed by the liquids in both situations

It is $180^{\circ}$ in I and $90^{\circ}$ in II
It is $0^{\circ}$ in I and $90^{\circ}$ in II
It is $90^{\circ}$ in I and $0^{\circ}$ in II
It is greater than $90^{\circ}$ in I and equal to $90^{\circ}$ in II

The correct answer is: It is $0 to the power of ring operator end exponent$ in I and $90 to the power of ring operator end exponent$ in II

For hemispherical shape – For flat surface –

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