 MCQ Questions for Class 11 Physics Chapter 9 Mechanical Properties of Solids with Answers

# MCQ Questions for Class 11 Physics Chapter 9 Mechanical Properties of Solids with Answers

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 9 Mechanical Properties of Solids with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Mechanical Properties of Solids Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

(a) 2 mm²
(b) 3 mm²
(c) 4 mm²
(d) 5 mm²

(c) 4 mm²

(a) E
(b) 2 E
(c) 4 E
(d) 25 E

(d) 25 E

(a) 4 : 1
(b) 1 : 4
(c) 1 : 2
(d) 2 : 1

(d) 2 : 1

## Q4. Hookes law essentially defines

(a) Stress
(b) Strain
(c) Yield point
(d) Elastic limit

(d) Elastic limit

## Q5. Longitudinal strain is possible in the case of

(a) Gases
(b) Liquid
(c) Only solids
(d) Only gases & liquids

(c) Only solids

(a) 2 : 3
(b) 3 : 4
(c) 4 : 3
(d) 9 : 16

(b) 3 : 4

(a) 25 N
(b) 50 N
(c) 100 N
(d) 200 N

(c) 100 N

(a) Copper
(b) Invar steel
(c) Brass
(d) Silver

(b) Invar steel

## Q9. An iron bar of length l m and cross section A m² is pulled by a force of F Newton from both ends so as to produce and elongation in meters. Which of the following statement statements is correct

(a) Elongation is inversely proportional to length l
(b) Elongation is directly proportional to cross section A
(c) Elongation is inversely proportional to A
(d) Elongation is directly proportional to Youngs modulus

(c) Elongation is inversely proportional to A

## Q10. The ratio of the change in dimension at right angles to the applied force to the initial dimension is known as

(a) Youngs modulus
(b) Poissons ratio
(c) Lateral strain
(d) Shearing strain

(c) Lateral strain

## Q11. Four wires whose lengths and diameter respectively are given below are made of the same material. Which of these will have the largest extension when same tension is applied?

(a) 0.50 m, 0.50 mm
(b) 1.00 mm, 1.00 mm
(c) 2.00 m, 2.00 mm
(d) 4.00 m, 4.00 mm

(a) 0.50 m, 0.50 mm

## Q13. The Young’s modulus of a perfectly rigid body is

a) infinity
b) some finite non-zero constant
c) zero
d) unity

a) infinity

## Q14. According to Hooke’s law of elasticity, if stress is increased, then the ratio of stress to strain

a) remains constant
b) increases
c) becomes zero
d) decreases

a) remains constant

a) stress
b) plasticity
c) elasticity
d) strain

a) stress

## Q16. In magnitude hydraulic stress is equal to

a) hydraulic pressure
b) hydraulic strain
c) hydraulic force
d) restoring force

a) hydraulic pressure

a) elastomer
b) plastic
c) ductile
d) brittle

a) elastomer

## Q18. The reason for the change in shape of a regular body is

a) volume stress
b) shearing strain
c) longitudinal strain
d) metallic strain

a) volume stress

a) area
b) length
c) volume
d) mass

a) area

## Q20. Which of the following affects the elasticity of a substance?

a) All of the above
b) Impurity in substance
c) Change in temperature
d) Hammering and annealing

a) All of the above

## Q21. If the load is increased beyond the _ point, the strain increases rapidly for even a small change in the stress

a) yield point
b) fracture point
c) elastic point
d) plastic point

a) yield point

## Q22. Which of the following elastic moduli is used to describe the elastic behaviour of object as they respond to the deforming forces acting on them?

a) All of these
b) Shear modulus
c) Young’s modulus
d) Bulk modulus

a) All of these