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Manipal Entrance Test 2014 Physics Paper
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© examsnet.com
Question : 14
Total: 60
The strain stress curves of three wires of different materials are shown in the figure. P. Q and R are the elastic limits of the wires. The figure shows that
elasticity of wire P is maximum
elasticity of wire Q is maximum
tensile strength of R is maximum
None of the above is true
Validate
Solution:
On the graph stress is represented on x-axis and strain y-axis
So from the graph
y
=
cot
θ
=
1
tan
θ
∝
1
θ
[where, θ is the angle from stress axis]
∴
Y
P
<
Y
Q
<
Y
R
[
As
θ
p
<
θ
0
<
θ
A
]
We can say that elasticity of wire P is minimum and R is maximum.
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