A gas undergoes a process in which its pressure P and volume V are related as ${\mathrm{VP}}^{\mathrm{n}}=\mathrm{constant}$. The bulk modulus for the gas in the process is
[Only for Dropper and XII batch]

1. $\frac{P}{n}$

2. ${P}^{1/n}$

3. nP

4. ${P}^{n}$

Concept Questions :-

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

Difficulty Level:

The Young's modulus of a wire of length 'L' and radius 'r' is 'Y'. If length is reduced to L/2 and radius r/2, then Young's modulus will be

1. Y/2

2. Y

3. 2Y

4. 4Y

Concept Questions :-

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

Difficulty Level:

Three wires A,B,C made of the same material and radius have different lengths. The graphs in the figure show the elongation-load variation. The longest wire is

1. A

2. B

3. C

4. All

Concept Questions :-

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

Difficulty Level:

The breaking stress of a wire depends upon

1. material of the wire

2. length of the wire

4. shape of the cross section

Concept Questions :-

Elasticity
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The elastic energy stored in a wire of Young's Modulus Y is -

1. $\mathrm{Y}×\frac{{\mathrm{strain}}^{2}}{\mathrm{volume}}$

2. $\mathrm{stress}×\mathrm{strain}×\mathrm{volume}$

3. $\frac{{\mathrm{strain}}^{2}×\mathrm{volume}}{2\mathrm{Y}}$

4. $\frac{1}{2}×stress×strain×volume$

Concept Questions :-

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

Difficulty Level:

If Young modulus (Y) equal to bulk modulus (B). Then the Poisson ratio is :

1. $\frac{1}{3}$

2. $\frac{2}{3}$

3. $\frac{1}{2}$

4. $\frac{1}{4}$

Concept Questions :-

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

Difficulty Level:

If a spring of spring constant k is stretched by a length x under tension T, the energy stored is

1. $\frac{2k}{{T}^{2}}$

2. $\frac{2{T}^{2}}{k}$

3. $\frac{{T}^{2}}{2k}$

4. $\frac{2T}{{k}^{2}}$

Concept Questions :-

Elasticity

Difficulty Level:

A wire of length L and radius r is fixed at one end and a force F applied to the other end produces an extension l. The extension produced in another wire of the same material of length 2L and radius 2r by a force 2F is

1. l

2. 2l

3. l/2

4. 4l

Concept Questions :-

Elasticity

Difficulty Level:

The length of a spring is l1 and l2, when stretched with a force of 4 N and 5 N respectively. Its natural length is

1. l2 + l1

2. 2(l2-l1)

3. 5l1 - 4l2

4. 5l2 - 4l1

Concept Questions :-

Hooke's law

Difficulty Level:

The Young's modulus of a wire of length L and radius r is If the length and radius are reduced to L/2 and r/2, then its Young's modulus will be -

(a) Y                           (b) 4Y

(c) 8Y                            (d) $\frac{Y}{8}$

Concept Questions :-

Stress-strain