In a capillary tube, water rises to a height of 4 cm. If the cross-sectional area of the tube were one-fourth, water would have risen to a height of :
Correct answer: C. 8 cm
- A. 2 cm
- B. 4 cm
- C. 8 cm
- D. 16 cm
Explanation
The height (h) of capillary rise is inversely proportional to the tube's radius (r). Since area (A) is proportional to r², theradius is proportional to the square root of the area. If the area becomes one-fourth, the radius is halved, causing the height to double to 8 cm.
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