1
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-0
A wire of negligible mass having uniform area of cross section ' A ' and young modulus ' Y ' is used to suspend a point mass ' m '. The point mass executes simple harmonic motion in a vertical plane with a period ' T ', then the length of the wire is :
A
$L=\frac{T Y^2 A}{4 \pi^2 m}$
B
$L=\frac{T^2 Y A}{4 \pi m^2}$
C
$L=\frac{T Y^2 A}{4 \pi m^2}$
D
$L=\frac{T^2 Y A}{4 \pi^2 m}$
2
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-0
Select the correct statement from the following:
A
Shear modulus of an ideal liquid is infinite
B
Rubber is more elastic than steel
C
The bulk modulus of a perfect rigid body is infinite
D
The bulk modulus of an ideal liquid is zero
3
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
One end of a nylon rope of length 1 and diameter 10 mm is fixed to free limb. A monkey weighing 100 N jumps to catch the free end and stays there. The change in diameter of the rope is (Young's modulus of the wire is Y and Poisson Ratio is $\sigma$ )
A
$\frac{4000 \sigma}{\pi Y}$
B
$\frac{400 \sigma}{\pi Y}$
C
$\frac{40000 \sigma}{\pi Y}$
D
$\frac{40000 \pi}{\sigma Y}$
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The temperature of a wire is doubled. The Young's modulus of elasticity

A
Will decrease
B
Will also double
C
Will become four times
D
Will remain the same
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