A steel ring of radius r and cross-section area A is fitted on to a wooden disc of radius 
. If Young's modulus be E, then the force with which the steel ring is expanded is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Initial length (circumference) of the ring 
Final length (circumference) of the ring 
Change in length 
Young's modulus, 
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