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

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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:  Notes | EduRev
D:  Notes | EduRev
Ans:
C
Solution:
 Notes | EduRev
U = 1/2 ((work done by gravity) Notes | EduRev

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 Δl 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:
 Notes | EduRev

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:  Notes | EduRev
B:  Notes | EduRev
C:  Notes | EduRev
D:  Notes | EduRev
Ans:
C
Solution:

 Notes | EduRev

Q 4. Copper of fixed volume ‘V’ is drawn into wire of length ‘l’. When this wire is subjected to a constant force ‘F’, the extension produced in the wire is ‘Δl’. Which of the following graphs is straight line?    [2014]
A: Δl versus l/l2
B: Δl versus l
C: Δl versus l/l
D: Δl versus l2
Ans: 
D
Solution:
 Notes | EduRev

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