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SRMJEE 2019 Paper with key

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Question : 9

Total: 140

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

AYR
r
AR
Yr
A
Y
(
r
R−r
)
AY(
R−r
R
)

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