Mechanical Properties of Solids MCQs for NEET

(1) The reason for the change in shape of a regular body is

[A] volume stress

[B] shearing strain

[C] longitudinal strain

[D] metallic strain

Answer: volume stress

(2) After terminal velocity is reached, the acceleration of a body falling through a fluid is

[A] zero

[B] equal to g

[C] less than g

[D] greater than g

Answer: zero

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

Article and Schedule Quiz	Start Test!

(3) Which of the following statements is/are wrong?

I. Hollow shaft is much stronger than a solid rod of same length and same mass.

II. Reciprocal of bulk modulus of elasticity is called compressibility.

III. It is difficult to twist a long rod as compared to small rod.

[A] III only

[B] I only

[C] II and III

[D] I and II

Answer: III only

(4) Terminal velocity of ball depends on

[A] density difference of liquid and ball

[B] density of ball only

[C] density of liquid only

[D] area of the ball

Answer: density difference of liquid and ball

(5) If a soap bubble formed at the end of the tube is blown very slowly, then the graph between excess pressure inside the bubble with time will be a

[A] parabolic curve sloping down

[B] parabolic curve sloping up

[C] straight line sloping down

[D] straight line sloping up

Answer: parabolic curve sloping down

(6) A wire suspended vertically from one of its ends is stretched by attaching a weight of 100N to its lower end. What is the elastic potential energy stored in the wire, if the weight stretches the wire by 1.5 mm?

[A] 5 × 10-2 J

[B] 10-3 J

[C] 2.5 × 10-3 J

[D] 7.5 × 10-2 J

Answer: 7.5 × 10-2 J

(7) Shearing strain is given by

[A] Deforming force

[B] Shape of shear

[C] Angle of shear

[D] Change in volume of the body

Answer: Angle of shear

(8) If a wire having initial diameter of 2 mm produced the longitudinal strain of 0.1%, then the final diameter of wire will be (s = 0.5)

[A] 2.002 mm

[B] 1.998 mm

[C] 1.999 mm

[D] 2.001 mm

Answer: 1.999 mm

(9) Under the action of load F1, the length of a string is L1 and that under F2, is L2. the original length of the wire is

[A] [L1F1 - L2F2] / [F1 + F2]

[B] [L1F2 - L2F1] / [F1 - F2]

[C] [L1F2 - L2F1] / [F2 - F1]

[D] [L1F2 - L2F1] / [F1 + F2]

Answer: [L1F2 - L2F1] / [F2 - F1]

(10) A body of mass 1 kg is attached to one end of a wire and rotated in horizontal circle of diameter 40 cm with a constant speed of 2 m/s. what is the area of cross-section of the wire if the stress developed in the wire is 5 × 106 N/m² ?

[A] 2 mm²

[B] 3 mm²

[C] 4 mm²

[D] 5 mm²

Answer: 4 mm²

(11) The compressibility of water is 4 × 10^-5 per unit atmospheric pressure. 100cc of water is subjected to a change of pressure of 100 atmospheres. The change in the volume will be

[A] 4 × 10^-5 cc

[B] 4 × 10^-2 cc

[C] 4 × 10^-4 cc

[D] 4 ?×10^-1 cc

Answer: 4 ?×10^-1 cc

(12) The radii of two wires of a same material are in ratio 2:1. if the wires are stretched by equal forces, the stress produced in them will be

[A] 2:1

[B] 4:1

[C] 1:4

[D] 1:2

Answer: 1:4

(13) 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

Answer: Lateral strain

(14) The Youngs modulus for a plastic body is

[A] One

[B] Zero

[C] Infinity

[D] Less then one

Answer: Zero

(15) If by applying a force, the shape of a body is changed, then the corresponding stress is known as

[A] Tensile stress

[B] Bulk stress

[C] Shearing stress

[D] Compressive stress

Answer: Shearing stress

(16) The force constant of a wire is K and that of another wire of the same material is 2K. when both the wires are stretched by the same force, then the work done is

[A] W2 = W1

[B] W2 = 0.5 W1

[C] W2 = 2W1

[D] W2 = 2W12

Answer: W2 = 0.5 W1

(17) If a material is heated and annealed, then its elasticity is

[A] Increased

[B] Decreased

[C] Not change

[D] Becomes zero

Answer: Decreased

(18) Four steel wires of the following dimensions are stretched with the same force. Which one of them will have the largest extension?

[A] L1 = 50 cm, r1 = 0.5 mm

[B] L2 = 100 cm, r2 = 1 mm

[C] L3 = 200 cm, r3 = 2 mm

[D] L4 = 300 cm, r4 = 3 mm

Answer: L1 = 50 cm, r1 = 0.5 mm

(19) The Youngs modulus for a plastic body is

[A] One

[B] Zero

[C] Infinity

[D] Less then one

Answer: Zero

(20) To compress a liquid by 10% of its original volume, the pressure required is 2 105 atmosphere. The bulk modulus of liquid is

[A] 2 x105 N/m²

[B] 2x 107 N/m²

[C] 2x 104 N/m²

[D] 2 x106 N/m²

Answer: 2 x106 N/m²

Take Mock Tests

Missiles Mock Test	Start Test!
SSC MTS Mock Test	Start Test
IBPS CLERK MOCK TEST	Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH)	Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi)	Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH)	Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH)	Start Test!
IB Security Assistant Mock test 1 (english)	Start Test!
UP POLICE CONSTABLE MOCK TEST 1	Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI)	Start Test!

Chapters

LEAVE A COMMENT

NCERT Solutions for class 11 Physics | Chapter 9 - Mechanical Properties of Solids

By Gkseries see more questions

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

Take Mock Tests

Chapters

Latest Test Series

SSC CGL

DELHI POLICE SI

WEST BENGAL PSC

CISF CONSTABLE

JAIIB

ADRE 2024

RRB RRC GROUP D

UP POLICE SI

NCERT Solutions for class 11 Physics | Chapter 9 - Mechanical Properties of Solids

By Gkseries see more questions

Download PDF

Take Mock Tests

Chapters

Latest Test Series