A gas undergoes a process in which its pressure P and volume V are related as VPn=constant. The bulk modulus for the gas in the process is 
 [Only for Dropper and XII batch]

1. Pn

2. P1/n

3. nP

4. Pn

Concept Questions :-

Stress-strain
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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 :-

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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
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The breaking stress of a wire depends upon

1. material of the wire

2. length of the wire

3. radius of the wire

4. shape of the cross section

Concept Questions :-

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

1. Y×strain2volume

2. stress×strain×volume

3. strain2×volume2Y

4. 12×stress×strain×volume

Concept Questions :-

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

1. 13

2. 23

3. 12

4. 14

Concept Questions :-

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

1. 2kT2

2. 2T2k

3. T22k

4. 2Tk2

Concept Questions :-

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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

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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

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The Young's modulus of a wire of length L and radius r is Y N/m2. 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) Y8

Concept Questions :-

Stress-strain
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Difficulty Level: