MCQ Class 11 Physics Chapter 8 Mechanical Properties Of Solids

MCQ’s For All Chapters – Physics Class 11th

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Which of the following represents Hooke's Law?

A

B

C

D

Question 1 of 20

2. A body is said to be perfectly plastic if

it does not recover its original shape / size when the deforming force is removed

it has the property of stretching indefinitely

it expands without breaking, on subjection of large strain

it is not effected by external force

Question 2 of 20

3. A body is said to be perfectly elastic if

it can move freely

it is not effected by external force

it recovers its original shape / size when the deforming force is removed

its surface is perfectly smooth

Question 3 of 20

4. Which diagram verifies Hooke's law?
A.B.C.D.

A

B

C

D

Question 4 of 20

5. Materials that show very small plastic range beyond elastic limit are called

Brittle materials

Elastomers

Elastic materials

Ductile materials

Question 5 of 20

6. The stress which is set up in the body due to increase in its dimensions is called

volumetric stress

Tangential stress

Normal stress

Tensile stress

Question 6 of 20

7. The modulus of elasticity of steel is greater than that of rubber because under the same stress

the strain in steel is less than rubber

the strain in steel is more than rubber

elongation in steel is more than in rubber

none of the above

Question 7 of 20

8. If proportional limit is not exceeded, energy per unit volume in stretched wire is

1/2 x stress x strain

stress x strain

stress x strain ²

1/2 stress x strain ²

Question 8 of 20

9. Putty or mud is an example of

semi elastic

plastic material

elastomers

elastic material

Question 9 of 20

10. A solid cylinder can be subjected to

tensile stress

compressive stress

shearing stress

all the above

Question 10 of 20

11. When a 13.2 kg mass is placed on top of a vertical spring, the spring compresses by 5.93 cm. Find the force constant of the spring.

2281 N/m

3181 N/m

2175 N/m

3085 N/m

Question 11 of 20

12. Two wires P and Q of same length and material but radii in the ratio 2 : 1 are suspended from a rigid support. Find the ratio of strain produced in the wires when both are under same force.

1 : 2

4 : 1

2 : 1

1 : 4

Question 12 of 20

13. Yield point may be defined as the point where

working stress ends and breaking stress begins

breaking stress ends and working stress begins

elastic behavior ends and plastic behavior begins

plastic behavior ends and elastic behavior begins

Question 13 of 20

14. Dimensional formula of stress is same as that of

pressure

impulse

strain

force

Question 14 of 20

15. In Hooke's law, the constant of proportionality signifies

modulus of elasticity

modulus of strain

elasticity of wire

modulus of stress

Question 15 of 20

16. After prolonged use, springs deform permanently because of

its rigidity

elastic fatigue

elastic after effect

plastic fatigue

Question 16 of 20

17. The area occupied below the stress-strain graph and above strain axis gives the value of

work done in producing extension

energy stored in the material

Restoring force.

energy density of the material

Question 17 of 20

18. The final point on the stress strain graph is called

Fracture point

Yield point

Elastic limit

Proportional limit

Question 18 of 20

19. Tissue of aorta blood vessel is an example of

state of permanant deformation

perfectly plastic body

perfectly elastic body

elastomer

Question 19 of 20

20. If we compress or elongate the solids, what happens to their potential energy?

P.E. of solid decreases whether it is compressed or elongated

P.E. of solid increases if it is elongated

P.E. of solid increases whether it is compressed or elongated

P.E. of solid increases if it is compressed

Question 20 of 20

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