Two elastic wire A and B having length lA = 2 m and lB = 1.5 m have Young’s modules ratio yA/yB = 7/4. If rB = 2 mm

Two elastic wire A and B having length l_A = 2 m and l_B = 1.5 m have Young’s modules ratio y_A/y_B = 7/4. If r_B = 2 mm then the radius of A given that due to application of same force change in length in both is equal -

(1) 1.7 mm

(2) 1.9 mm

(3) 2.7 mm

(4) 2 mm

Two elastic wire A and B having length lA = 2 m and lB = 1.5 m have Young’s modules ratio yA/yB = 7/4. If rB = 2 mm

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