First slide

Elastic Modulie

Question

The Young's modulus of a wire is numerically equal to the stress which will

Moderate

A

not change the length of the wire
B

double the length of the wire
C

increase the length by 50%
D

change the radius of the wire to half

Solution

$Y = \frac{Stress}{Strain}, Y = Stress for unit strain or Δl = l$
Hence, stress will double the length of the wire.

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