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A steel ring of radius r and cross secti...

A steel ring of radius r and cross section area A is fitted on to a wooden disc of radius `R(Rgtr)`. If Young's modulus be R, then the force with which the steel ring is expanded is

A

A Y (R/r)

B

A Y (R - r)/r

C

`(Y/A)((R-r)/r)`

D

(Yr)/(AR)`

Text Solution

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The correct Answer is:
B
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