Test Academy | A 5 m long aluminum wire ( Y = 7 x 10¹⁰ N / m²) of diameter 3 mm supports a 40 kg mass. In order to have the same elongation in a copper wire ( Y = 12 x 10¹⁰ N / m² ) of the same length under the same weight, the diameter should now be, in mm 1.75, 2.0, 2.3, 5.0

Question

A 5 m long aluminum wire ( Y = 7 x 10¹⁰ N / m²) of diameter 3 mm supports a 40 kg mass. In order to have the same elongation in a copper wire ( Y = 12 x 10¹⁰ N / m² ) of the same length under the same weight, the diameter should now be, in mm

Options :

1.75
2.0
2.3
5.0

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