The force constant of a wire does not depend on

(a) Nature of the material                      (b) Radius of the wire

(c) Length of the wire                           (d) None of the above

Concept Questions :-

Stress-strain
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The length of a wire is 1.0 m and the area of cross-section is $1.0×{10}^{-2}c{m}^{2}$. If the work done for increase in length by 0.2 cm is 0.4 joule, then Young's modulus of the material of the wire is

(a) $2.0×{10}^{10}N/{m}^{2}$             (b) $4×{10}^{10}N/{m}^{2}$

(c) $2.0×{10}^{11}N/{m}^{2}$             (d) $2×{10}^{10}N/{m}^{2}$

Concept Questions :-

Stress-strain
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The quality of the material which opposes the change in shape, volume or length is called

(a)   Intermolecular repulsion

(b)   Intermolecular behaviour

(c)   Viscosity

(d)   Elasticity

Concept Questions :-

Elasticity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

For silver, Young's modulus is  and Bulk modulus is . Its Poisson's ratio will be

1. -1                                     2. 0.5

3. 0.39                                  4. 0.25

Concept Questions :-

Poisson ratio
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A wire of length L and radius r is  rigidly fixed at one end. On stretching the other end of the wire with a force F, the increase in its length is l. If another wire of same material but of length 2L and radius 2r is stretched with a force of 2F, the increase in its length will be

(a) l                                       (b) 2l

(c) $\frac{l}{2}$                                    (d) $\frac{l}{4}$

Concept Questions :-

Hooke's law
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In steel, the Young's modulus and the strain at the breaking point are $2×{10}^{11}N{m}^{-2}$ and 0.15 respectively. The stress at the breaking point for steel is therefore -

(a) $1.33×{10}^{11}N{m}^{-2}$           (b) $1.33×{10}^{12}N{m}^{-2}$

(c) $7.5×{10}^{-13}N{m}^{-2}$           (d) $3×{10}^{10}N{m}^{-2}$

Concept Questions :-

Hooke's law
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Which one of the following substances possesses the highest elasticity

(a) Rubber                             (b) Glass

(c) Steel                               (d) Copper

Concept Questions :-

Elasticity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Which one of the following quantities does not have the unit of force per unit area

(a) Stress

(b) Strain

(c) Young's modulus of elasticity

(d) Pressure

Concept Questions :-

Stress-strain
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A copper wire and a steel wire of the same diameter and length are connected end to end and a force is applied, which stretches their combined length by 1 cm. The two wires will have

(a)   Different stresses and strains

(b)   The same stress and strain

(c)   The same strain but different stresses

(d)   The same stress but different strains

Concept Questions :-

Stress-strain
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The possible value of Poisson's ratio is

(a) 1                                        (b) 0.9

(c) 0.8                                      (d) 0.4

Concept Questions :-

Poisson ratio