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Published on: 21/10/2025
Download CBSE Class 11th Standard CBSE Physics question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Physics
Questions + Answers key
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1.
A wire of length L and cross section A is make of material of Young's modulus Y.It is stretched by an amount x. the work done is
\(\frac{Y x A}{2 L}\)
\(\frac{Y x^{2} A}{L}\)
\(\frac{Y x^{2} A}{2 L}\)
\(\frac{2 Y x^{2} A}{L}\)
2.
The displacement of a particle is represented by the following equation s = 2(t3 + 7t2 + 5t + 8 where s is in metres and t in seconds. The acceleration of the particle at t = 1 s is
18 m/s 2
32 m/s 2
zero
14 m/s 2
3.
The length of a rod is \((11.05 \pm 0.05)\) cm. What is the total length of 2 such rods?
\((22.1 \pm 0.05)\) cm
\((22.10 \pm 0.05)\) cm
\((22.1 \pm 0.11)\) cm
\((22.1 \pm 0.10)\) cm
4.
A steel rod of length 1m and radius 10mm is stretched by a force 100 kN along its length. The stress produced in the rod is YSteel = 2 x 1011 Nm-2 .
3.18 x 106 Nm-2
3.18 x 107 Nm-2
3.18 x 108 Nm-2
3.18 x 109 Nm-2
5.
When a pressure of 100 atmosphere is applied on a spherical ball of rubber, then its volume reduces to 0.01 %. The bulk modulus of the material of the rubber in dyne cm-2 is
10 x 10 12
100 x 1012
1 x 1012
20 x 1012
6.
A wire is stretched to double its length. The strain is
2
1
Zero
0.5
7.
A vehicle travels half the distance I with speed v 1 and the other half with speed v2 f then its average speed is
\(\frac{v_{1}+v_{2}}{2}\)
\(\frac{2 v_{1}+v_{2}}{v_{1}+v_{2}}\)
\(\frac{2 v_{1} v_{2}}{v_{1}+v_{2}}\)
\(\frac{L\left(v_{1}+v_{2}\right)}{v_{1} v_{2}}\)
8.
The number of significant figures in the numbers 4.8000 x 104 and 48000.50 are respectively,_____.
5 and 6
5 and 7
2 and 7
2 and 6
9.
Which of the following is not a vector quantity?
acceleration
velocity
speed
displacement
10.
Young's modulus of a wire depends on
its material
its length
its area of cross-section
both (b) and (c)
11.
The reciprocal of Bulk modulus (1/K) is called
Young's modulus
modulus of rigidity
Hooke's law
compressibility
12.
Area under acceleration time graph is
Displacement
Velocity
Acceleration
None
13.
A particle moving in a circle with uniform speed. It has constant
Velocity
kinetic energy
Acceleration
Displacement
14.
Two equal vectors have a resultant equal to either of them. The angle between them is
60°
90°
100°
120°
15.
The vector sum of the forces of 10N and 6N can be
2N
8N
18N
20N
1.
(c)
\(\frac{Y x^{2} A}{2 L}\)
2.
(b)
32 m/s 2
3.
(d)
\((22.1 \pm 0.10)\) cm
4.
(c)
3.18 x 108 Nm-2
5.
(c)
1 x 1012
6.
(b)
1
7.
(c)
\(\frac{2 v_{1} v_{2}}{v_{1}+v_{2}}\)
8.
(b)
5 and 7
9.
(c)
speed
10.
(a)
its material
11.
(d)
compressibility
12.
(b)
Velocity
13.
(b)
kinetic energy
14.
(d)
120°
15.
(b)
8N
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