A copper wire of negligible mass, 1 m length and cross-sectional area 10^ -6 m^2 is kept on a smooth...

Question

A copper wire of negligible mass, 1 m length and cross-sectional area 10^ -6 m^2 is kept on a smooth horizontal table with one end fixed. A ball of mass 1 kg is attached to the other end. The wire and the ball are rotated with an angular velocity of 20 rad ,s^ -1 . If the elongation in the wire is 10^ -3 m, then the Young's modulus is

Accepted Answer

(A)

JEE Main Physics question

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