Question Detail

PHY 101 Surface Tension Objective Question
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Question

In the capillary rise formula, h = (2γ cos θ) / (ρ g r), what does the term 'r' represent?
Options
A The diameter of the capillary tube
B The radius of the capillary tube
Correct Answer
C The circumference of the capillary tube
D The radial distance from the wall to the center of the meniscus
Correct Answer

Option B is the correct answer.

Detailed Explanation

In the standard capillary rise formula, r specifically denotes the inside radius of the capillary tube. This is the relevant dimension for calculating the cross-sectional area and the length of the contact line.

Hint

Check the definition of variables in the formula. It is not the diameter.

Question Info

Course: PHY 101
Topic: Surface Tension
Type: Objective
Difficulty: Not specified
Question 722 of 1250
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