STANDARDPhysics-Mechanical Properties of Fluids
STANDARD Physics Surface Tension MCQ Question
Type: MCQ-numerical-Medium-Class 11
Surface tension of mercury is 0.465 N m⁻¹. The excess pressure inside a mercury drop of diameter 6 mm is
A
310 Pa
B
410 Pa
C
510 Pa
D
610 Pa
Correct Answer
Option A
Detailed Explanation
The excess pressure inside a drop is given by the formula ΔP = 2T/r, where T is the surface tension and r is the radius of the drop. The diameter is given, so the radius is half of that.
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