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The length of wire increases by $1.0 mm$ under a given load. The increase in length of a wire of same material but of length and diameter twice that of the first, under the same load, will be:

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Important Questions on Elasticity

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11th ICSE

IMPORTANT

ISC Physics Class XI Part 1>Chapter 18 - Elasticity>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 10

The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?

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ISC Physics Class XI Part 1>Chapter 18 - Elasticity>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 11

By combining copper and steel wires of the same length and same diameter, a force is applied at their one end. The combined length is increased by

1 cm

. The wire will have:

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ISC Physics Class XI Part 1>Chapter 18 - Elasticity>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 12

A composite wire, half aluminium and half steel, of uniform cross-section, is hung from a rigid support and a heavy mass is attached at the free end. Young's modulus of steel is

(20 / 7)

times of aluminium. The ratio of increase in length of steel wire to aluminium wire is:

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ISC Physics Class XI Part 1>Chapter 18 - Elasticity>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 13

An increase of

0.1 %

in the length of a wire of cross-section

10^{- 6} m^{2}

causes tension of

100 N

in the wire. The Young's modulus of the wire is:

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ISC Physics Class XI Part 1>Chapter 18 - Elasticity>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 14

The adjacent graph shows the extension

(∆ l)

of a wire of length

1 m ∆ l (\times 10^{- 4} N / m^{2})

suspended from the top of a roof at one end a load connected to the other end. The cross-sectional area of the wire is

10^{- 6} m^{2}

. The Young's modulus of the material of the wire is:

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ISC Physics Class XI Part 1>Chapter 18 - Elasticity>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 15

A force of

10^{3} N

increases the length of a suspended write by

1 mm

. To increase the length by

1 mm

of a wire of the same material, same length but diameter four times the force required is:

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ISC Physics Class XI Part 1>Chapter 18 - Elasticity>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 16

Two wires are made of the same material and have the same volume. However, wire

- 1

has a cross-sectional area

A

, and wire

- 2

has cross-sectional area

3 A

. If the length of wire

- 1

increases by

∆ x

on applying force F, how much force is needed to stretch wire

- 2

by the same amount?

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ISC Physics Class XI Part 1>Chapter 18 - Elasticity>FOR DIFFERENT COMPETITIVE EXAMINATIONS>Q 17

To break a wire of

1 mm

radius, a force of

10 N

is required. To break a wire of

3 mm

radius, the required force will be :

The length of wire increases by 1.0 mm under a given load. The increase in length of a wire of same material but of length and diameter twice that of the first, under the same load, will be:

Important Questions on Elasticity

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The length of wire increases by $1.0 mm$ under a given load. The increase in length of a wire of same material but of length and diameter twice that of the first, under the same load, will be: