Physics-Young's Modulus
NEET Physics Young's Modulus MCQ Question
Type: MCQ-fact-Hard-Class 11
What is the formula for calculating the area of cross-section (A) of a steel rope used in a crane with a lifting capacity of 10 tonnes, ensuring the load does not exceed the yield strength?
A
A ≥ W/σ_y
B
A ≤ W/σ_y
C
A = W/σ_y
D
A = σ_y/W
Correct Answer
Option A
Detailed Explanation
The correct formula is derived from the requirement that the area of cross-section must be at least A ≥ W/σ_y to prevent permanent deformation of the rope, as stated in the NCERT context.
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