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# Notes | EduRev

## Physics 28 Years Past year papers for NEET/AIPMT Class 11

Created by: Shiksha Academy

## NEET : Notes | EduRev

The document Notes | EduRev is a part of the NEET Course Physics 28 Years Past year papers for NEET/AIPMT Class 11.
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Q 1. When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L + l). The elastic potential energy stored in the extended wire is:    [2019]
A: Mgl
B: MgL
C:
D:
Ans:
C
Solution:

U = 1/2 ((work done by gravity)

Q 2. Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by Î”l on applying a force F, how much force is needed to stretch the second wire by the same amount ?    [2018]
A: 9F
B: 6F
C: 4F
D: F
Ans:
A
Solution:

Q 3. The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'p', the fractional decrease in radius is:-    [2017]
A:
B:
C:
D:
Ans:
C
Solution:

Q 4. Copper of fixed volume â€˜Vâ€™ is drawn into wire of length â€˜lâ€™. When this wire is subjected to a constant force â€˜Fâ€™, the extension produced in the wire is â€˜Î”lâ€™. Which of the following graphs is straight line?    [2014]
A: Î”l versus l/l2
B: Î”l versus l
C: Î”l versus l/l
D: Î”l versus l2
Ans:
D
Solution:

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