JAMB Physics 2011 Objective — Question 8

Question 8 of 49 from the Joint Admissions and Matriculation Board (JAMB) Physics 2011 Objective paper, with the correct answer and a full explanation.

If a tube of small radius opened at both ends is placed in a liquid, the liquid will

A. A. fall below the liquid level if the liquid does not wet the glassCorrect
B. B. rise above the liquid level if the liquid does not wet the glass
C. C. remain at the same level irrespective of whether the liquid wets the glass or not
D. D. fall below the liquid level if the liquid wets the glass

Explanation

If a narrow tube is placed in a liquid that does not wet the glass (e.g. mercury), the liquid falls below the liquid level. For a liquid that wets glass (e.g. water), the liquid rises above the liquid level.

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