Physics Elasticity Question 85

Question: A force F is needed to break a copper wire having radius R. The force needed to break a copper wire of radius 2R will be

[MP PET 1990]

Options:

A) F/2

B) 2F

C) 4F

D) F/4

Show Answer

Answer:

Correct Answer: C

Solution:

Breaking Force µ Area of cross section of wire (pr2) If radius of wire is double then breaking force will become four times.

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