NEET UG PHYSICS MCQ: MECHANICAL PROPERTIES OF SOLIDS

1 Hard

1 of 1

Application +4 | -1

A copper wire

\left(Y=10^{11} \mathrm{Nm}^{-2}\right)

of length

8 \mathrm{~m}

and a steel wire

\left(Y=2 \times 10^{11} \mathrm{Nm}^{-2}\right)

of length

4 \mathrm{~m}

, each of

0.5 \mathrm{~cm}^2

cross-section are fastened end-to-end and stretched with a tension of

500 \mathrm{~N}

. Choose the correct statement.

View answer and explanation

Correct option: D

All of the above

Option D (All of the above) is correct because the elongation in each wire, the relationship between them, and the total elongation are all accurately calculated and consistent with the given information.

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A 20 kg load is suspended by a wire of area of cross section is

1\,m{m^2}

. The stress produced in

N/{m^2}

\left[ {g = 10\,m{s^{ - 2}}\,} \right]\,

In magnitude hydraulic stress is equal to: A wire extends by

\mathrm{1 mm}

when a force is applied. Double the force is applied to another wire of same material and length but half the radius of cross-section. The elongation of the wire in mm will be Stress to strain ratio is equivalent to A

2\,\,m

long rod of radius

1\,\,cm

which is fixed from one end is given a twist of

0.8

radians. The shear strain developed will be The relationship between Young’s modulus

Y

, Bulk modulus

\mathrm{K}

and modulus of rigidity

\eta