Beta Question Bank for Medical: Physics>Chapter 12 - Elasticity>Exercise (Conceptual Questions)>Q 7

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The Young’s modulus of a rubber string which is $8 cm$ long and whose density is $1.5 kg m^{- 3}$ is $5 \times 10^{8} N m^{- 2}$ . It is suspended on the ceiling in a room. The increase in length due to its own weight will be,

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Important Questions on Elasticity

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Beta Question Bank for Medical: Physics>Chapter 12 - Elasticity>Exercise (Conceptual Questions)>Q 8

A ball falling in a lake of depth $200 m$ shows $0.1 %$ decrease in its volume at the bottom.

What is the bulk modulus of the material of the ball?

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Beta Question Bank for Medical: Physics>Chapter 12 - Elasticity>Exercise (Conceptual Questions)>Q 9

The pressure of a medium is changed from

1.01 \times 10^{5} Pa

to

1.165 \times 10^{5} Pa

and change in volume is

10 %

, keeping the temperature constant. The Bulk modulus of the medium is

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Beta Question Bank for Medical: Physics>Chapter 12 - Elasticity>Exercise (Conceptual Questions)>Q 10

Two wires of the same material and length but diameters in the ratio

1 : 2

are stretched by the same force. The potential energy per unit volume for the two wires when stretched will be in the ratio.

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Beta Question Bank for Medical: Physics>Chapter 12 - Elasticity>Exercise (Conceptual Questions)>Q 11

A weight is suspended from a long metal wire. If the wire suddenly breaks, its temperature,

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Beta Question Bank for Medical: Physics>Chapter 12 - Elasticity>Exercise (Conceptual Questions)>Q 12

A mass of

0.5 kg

is suspended from wire. The length of wire increases by

3 mm

. Then, find out the work done.

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Beta Question Bank for Medical: Physics>Chapter 12 - Elasticity>Exercise (Conceptual Questions)>Q 13

If the strain in a wire is not more than

\frac{1}{1000}

and

Y = 2 \times 10^{11} N m^{- 2}

. The diameter of the wire is

1 mm

. The maximum weight hung from the wire is

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Beta Question Bank for Medical: Physics>Chapter 12 - Elasticity>Exercise (Conceptual Questions)>Q 14

When a tension

F

is applied in uniform wire of length

l

and radius

r

, the elongation produced is

e

. When tension

2 F

is applied, the elongation produced in another uniform wire of length

2 l

and radius

2 r

made of same material is,

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Beta Question Bank for Medical: Physics>Chapter 12 - Elasticity>Exercise (Conceptual Questions)>Q 15

How much force is required to produce an increase of

0.2 %

in the length of a brass wire of diameter

0.6 mm

?
[Young’s modulus for brass

= 0.9 \times 10^{11} N m^{- 2}

]