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NEET UG PHYSICS MCQ: MECHANICAL PROPERTIES OF SOLIDS

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In magnitude hydraulic stress is equal to:

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Correct option: B

Hydraulic pressure

Option B (Hydraulic pressure) is correct because hydraulic stress is defined as the applied hydraulic pressure.

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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]\,

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

\mathrm{K}

and modulus of rigidity

\eta

is Four wires of the same material are stretched by the same load. Which one of them will elongate most if their dimensions are as follows