Properties of Solids & Liquids [NEST (National Entrance Screening Test) Physics]: Questions 1 - 3 of 3

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Question number: 1

» Properties of Solids & Liquids » Young's Modulus

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Appeared in Year: 2015

MCQ▾

Question

The stress – strain plot for wires made of two materials ( and ) is presented schematically in the accompanying figure. The points and represent fracture points of the two materials and respectively. It can be concluded from these graphs that –

Graph of Stress vs Strain

Graph of Stress vs Strain

Choices

Choice (4)Response

a.

Material and are equally brittle

b.

The linear region of material extends to a larger value of stress that of material .

c.

Material is more ductile than material

d.

Material has Young’s modulus larger than that of material

Question number: 2

» Properties of Solids & Liquids » Application of Surface Tension

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Appeared in Year: 2014

MCQ▾

Question

The surface of a liquid is just able to support the weight of a six – legged insect. The leg ends can be assumed to be spheres each of radius and the weight of the insect is distributed equally over the six legs. The coefficient of surface tension in this case is and the angle of the footfall with respect to the vertical is (see figure). The mass of the insect is closed to –

Leg of insect floating on surface of liquid

Leg of Insect Floating on Surface of Liquid

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 3

» Properties of Solids & Liquids » Surface Energy and Surface Tension

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Appeared in Year: 2019

Essay Question▾

Describe in Detail

Consider the surface defined by , where and are constants. If and are unit normal vectors to the surface at the points and respectively, and is a unit vector normal to both and , then

Explanation

Normal vector to the surface: -

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