The possible value of Poisson's ratio is

(a) 1                                        (b) 0.9

(c) 0.8                                      (d) 0.4

Concept Questions :-

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

Difficulty Level:

Which of the following affects the elasticity of a substance

(a) Hammering and annealing

(b) Change in temperature

(c) Impurity in substance

(d) All of these

Concept Questions :-

Elasticity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

A wire of diameter 1mm  breaks under a tension of 1000 N. Another wire, of same material as that of the first one, but of diameter 2 mm breaks under a tension of

(a)   500 N                                (b)   1000 N

(c)   10000 N                            (d)   4000 N

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

There is no change in the volume of a wire due to change in its length on stretching. The Poisson's ratio of the material of the wire is

(a)   + 0.50                                (b)   – 0.50

(c)   0.25                                   (d)   – 0.25

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The force required to stretch a steel wire of cross-section  to 1.1 times its length would be

(a) $2×{10}^{6}N$                               (b) $2×{10}^{3}N$

(c) $2×{10}^{-6}N$                             (d) $2×{10}^{-7}N$

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

When a weight of 10 kg is suspended from a copper wire of length 3 metres and diameter 0.4 mm, its length increases by 2.4 cm. If the diameter of the wire is doubled, then the extension in its length will be

(a) 9.6 cm                               (b) 4.8 cm

(c) 1.2 cm                               (d) 0.6 cm

Concept Questions :-

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

Difficulty Level:

A fixed volume of iron is drawn into a wire of length L. The extension x produced in this wire by a constant force F is proportional to

(a) $\frac{1}{{L}^{2}}$                                              (b) $\frac{1}{L}$

(c) ${L}^{2}$                                                (d) L

Concept Questions :-

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

Difficulty Level:

On applying a stress of $20×{10}^{8}$ N/${m}^{2}$ the length of a perfectly elastic wire is doubled. Its Young’s modulus will be

(a) $40×{10}^{8}N/{m}^{2}$                         (b) $20×{10}^{8}N/{m}^{2}$

(c) $10×{10}^{8}N/{m}^{2}$                         (d) $5×{10}^{8}N/{m}^{2}$

Concept Questions :-

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

Difficulty Level:

The length of an elastic string is a metre when the longitudinal tension is 4 N and b metre when the longitudinal tension is 5 N. The length of the string in metre when the longitudinal tension is 9 N is

(a) a - b                                             (b) 5b - 4a

(c) 2b -$\frac{1}{4}a$                                        (d) 4a - 3b

Concept Questions :-

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

Difficulty Level:

How much force is required to produce an increase of 0.2% in the length of a brass wire of diameter 0.6 mm ?

(Young’s modulus for brass = $0.9×{10}^{11}N/{m}^{2}$)

(a) Nearly 17 N                        (b) Nearly 34 N

(c) Nearly 51                        (d) Nearly 68 N

Concept Questions :-

Hooke's law