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Question (41)

QN0035561

Consider four steel wires of dimensions given below ( diameter and length) :
(A)
(B)
(C)
(D)
If same force is applied to all the wires then the elastic potential energy stored will be maximum in wire:

(A)
A
(B)
B
(C)
C
(D)
D

Correct Answer: C

Explanation:

We have,

where

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Question (42)

QN0035562

If in a wire of Young's modulus , longitudinal strain is produced, then the value of potential energy stored
in its unit volume will be

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

P.E. stress strain volume or P.E. volume strain (strain)

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Question (43)

QN0035563

The Young's modulus of the material of a wire is . If the elongation strain is , then the
energy stored in the wire per unit volume in is

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

Work done per unit volume

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Question (44)

QN0035564

A 5 metre long wire is fixed to the ceiling. A weight of is hung at the lower end and is 1 metre above
the floor. The wire was elongated by . The energy stored in the wire due to stretching is

(A)
zero
(B)
0.05 joule
(C)
100 joule
(D)
500 joule

Correct Answer: B

Explanation:

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Question (45)

QN0035565

A wire suspended vertically from one of its ends is stretched by attaching a weight of to the lower end.
The weight stretches the wire by . Then the elastic energy stored in the wire is

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Elastic energy

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Question (46)

QN0035566

An aluminium rod with Young's modulus undergoes elastic strain of . The
energy per unit volume stored in the rod in SI unit is:

(A)
5600
(B)
8400
(C)
2800
(D)
11200

Correct Answer: A

Explanation:

Young's modulus,

Strain

The energy per unit volume stored in the rod,

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Question (47)

QN0035567

If and are the values of Young's modulus, bulk modulus and modulus of rigidity of any material respectively. Choose the correct relation for these parameters.

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

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Question (48)

QN0035568

When a force is applied on a wire of uniform cross-section area and length , the increase in
length is 1 . Energy stored in it will be

(A)
(B)
0.177 J
(C)
(D)

Correct Answer: C

Explanation:

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Question (49)

QN0035569

A metal rod of Young's modulus undergoes an elastic strain of . The energy per
unit volume stored in is

(A)
3600
(B)
7200
(C)
10800
(D)
14400

Correct Answer: A

Explanation:

volume

[Strain ]

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Question (50)

QN0035570

When the load on a wire is increasing slowly from to , the elongation increases from to .
The work done during this extension of the wire is (

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

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Question (41)

Consider four steel wires of dimensions given below ( diameter and length) : (A) (B) (C) (D) If same force is applied to all the wires then the elastic potential energy stored will be maximum in wire:

Explanation:

Link:

Question (42)

If in a wire of Young's modulus , longitudinal strain is produced, then the value of potential energy stored in its unit volume will be

Explanation:

Link:

Question (43)

The Young's modulus of the material of a wire is . If the elongation strain is , then the energy stored in the wire per unit volume in is

Explanation:

Link:

Question (44)

A 5 metre long wire is fixed to the ceiling. A weight of is hung at the lower end and is 1 metre above the floor. The wire was elongated by . The energy stored in the wire due to stretching is

Explanation:

Link:

Question (45)

A wire suspended vertically from one of its ends is stretched by attaching a weight of to the lower end. The weight stretches the wire by . Then the elastic energy stored in the wire is

Explanation:

Link:

Question (46)

An aluminium rod with Young's modulus undergoes elastic strain of . Theenergy per unit volume stored in the rod in SI unit is:

Explanation:

Link:

Question (47)

If and are the values of Young's modulus, bulk modulus and modulus of rigidity of any material respectively. Choose the correct relation for these parameters.

Explanation:

Link:

Question (48)

When a force is applied on a wire of uniform cross-section area and length , the increase in length is 1 . Energy stored in it will be

Explanation:

Link:

Question (49)

A metal rod of Young's modulus undergoes an elastic strain of . The energy per unit volume stored in is

Explanation:

Link:

Question (50)

When the load on a wire is increasing slowly from to , the elongation increases from to . The work done during this extension of the wire is (

Explanation:

Link:

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Consider four steel wires of dimensions given below ( diameter and length) :
(A)
(B)
(C)
(D)
If same force is applied to all the wires then the elastic potential energy stored will be maximum in wire:

If in a wire of Young's modulus , longitudinal strain is produced, then the value of potential energy stored
in its unit volume will be

The Young's modulus of the material of a wire is . If the elongation strain is , then the
energy stored in the wire per unit volume in is

A 5 metre long wire is fixed to the ceiling. A weight of is hung at the lower end and is 1 metre above
the floor. The wire was elongated by . The energy stored in the wire due to stretching is

A wire suspended vertically from one of its ends is stretched by attaching a weight of to the lower end.
The weight stretches the wire by . Then the elastic energy stored in the wire is

An aluminium rod with Young's modulus undergoes elastic strain of . The
energy per unit volume stored in the rod in SI unit is:

When a force is applied on a wire of uniform cross-section area and length , the increase in
length is 1 . Energy stored in it will be

A metal rod of Young's modulus undergoes an elastic strain of . The energy per
unit volume stored in is

When the load on a wire is increasing slowly from to , the elongation increases from to .
The work done during this extension of the wire is (