1
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

A wire, made of a certain material of length-l and area of cross section-a can withstand a maximum load $=\mathrm{W}$ without breaking. If, another wire of the same material and crosssectional area is used with double the original length, what will be the maximum load that the wire can withstand, without breaking?

A

Will be halved to 0.5 W

B

Will be doubled to 2 W

C

Remains the same $=\mathrm{W}$

D

Would be four times $=4 \mathrm{~W}$

2
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

A light rod of length 1 m is suspended from ceiling horizontally by means of two vertical wires of equal length tied to its ends. One of the wires is made of material $X$ and is of cross-section $0.1 \mathrm{~cm}^2$. and the other of material Y of cross-section $0.3 \mathrm{~cm}^2 . \mathrm{A}$ weight is hung from the wire at a point to produce equal strain in the wires. The ratio of Young's moduli of wires A to B is $3: 1$. The location of the point from one end of the wire is

A

0.2 m

B

0.75 m

C

0.5 m

D

0.25 m

3
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
$L=\frac{T^2 Y A}{4 \pi^2 m}$
4
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

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