First slide

Stress and strain

Question

In the given figure, if the dimensions of the wires are the same and materials are different, Young's modulus is more for

Easy

A

A
B

B
C

Both
D

None of these

Solution

$F = (\frac{Y A}{l}) \cdot Δ l$ i.e. F- $Δ l$ graph is a straight line with slope
$\frac{Y A}{l}$ i .e. slope is proportional to Y .
(Slope)_A > (Slope)_B
$∴$ Y_A > Y_B

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