A Text Book of PHYSICS PART I : CLASS 11>Chapter 12 - Elasticity>EXERCISE>Q 7

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A rope $1 cm$ in diameter breaks if the tension in it exceeds $500 N$ . The maximum tension that may be given to a similar rope of diameter $2 cm$ is

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Important Questions on Elasticity

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IMPORTANT

A Text Book of PHYSICS PART I : CLASS 11>Chapter 12 - Elasticity>EXERCISE>Q 8

Two massless springs of force constants

K_{1}

and

K_{2}

are joined end to end. The resultant force constant

K

of the system is

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A Text Book of PHYSICS PART I : CLASS 11>Chapter 12 - Elasticity>EXERCISE>Q 9

The length of a metal wire is

I_{1}

when the tension in it is

T_{1}

and

l_{2}

when the tension is

T_{2}

. The natural length of the wire is

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A Text Book of PHYSICS PART I : CLASS 11>Chapter 12 - Elasticity>EXERCISE>Q 10

The length of a wire is

13.5 cm

and its radius is

1 mm

. Its length is increased by

0.6 cm

by a force applied along its length. If this causes a shortening of radius by

\frac{1}{500} mm

, the Poisson's ratio for the material of the wire is

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A Text Book of PHYSICS PART I : CLASS 11>Chapter 12 - Elasticity>EXERCISE>Q 11

A wire can sustain a weight of

20 kg

before breaking. If the wire is cut into two equal parts, each part can sustain a weight of.

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A Text Book of PHYSICS PART I : CLASS 11>Chapter 12 - Elasticity>EXERCISE>Q 12

The lengths of two wires made of same material are

L

and

\frac{L}{2}

and radii are

r

and

\frac{r}{2}

. The ratio of their Young's moduli is

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A Text Book of PHYSICS PART I : CLASS 11>Chapter 12 - Elasticity>EXERCISE>Q 13

Which of the following substances has the greatest elasticity ?

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A Text Book of PHYSICS PART I : CLASS 11>Chapter 12 - Elasticity>EXERCISE>Q 14

The Poisson ratio of the material is

0.5

. If a force is applied be a wire of this material, there is a decrease in cross-sectional area by

4 %

. The percentage increase in length is

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A Text Book of PHYSICS PART I : CLASS 11>Chapter 12 - Elasticity>EXERCISE>Q 15

A rod elongates by

l

when a body of mass

M

is suspended from it. The work done is