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NEET UG PHYSICS MCQ: MECHANICAL PROPERTIES OF SOLIDS

1 Easy

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Application +4 | -1

If the ratio of lengths, radii and Young's moduli of steel and copper are 4, 3 and 2 respectively. The ratio of their increase in lengths would be (same force

F

is applied to them)

View answer and explanation

Correct option: A

\frac{2}{9}

Option A (

\frac{2}{9}

) is correct because the ratio of increase in lengths is derived from Young's modulus formula, considering the ratios of lengths, radii, and Young's moduli.

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

1\,m{m^2}

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\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

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

Y

\mathrm{K}

and modulus of rigidity

\eta