Properties of Solids & Liquids (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 4 - 6 of 15

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Question number: 4

» Properties of Solids & Liquids » Young's Modulus

Appeared in Year: 2015

MCQ▾

Question

A horizontal steel railroad track has a length of 100 m when the temperature is 250 C. The track is constrained from expanding or bending. The stress on the track on a hot summer day, when the temperature is 400 C, is –

(Note: the linear coefficient of thermal expansion for steel is Equation and the Young’s modulus of steel is Equation )

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 5

» Properties of Solids & Liquids » Temperature

Appeared in Year: 2015

MCQ▾

Question

A closed bottle containing water at 300 C is open on the surface of the moon. Then,

Choices

Choice (4) Response

a.

The water will come out as a spherical ball.

b.

The water will freeze.

c.

The water will boil.

d.

The water will decompose into hydrogen and oxygen.

Question number: 6

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

Question

A metal rod of length 50 cm and radius 1.5 cm is covered with an insulating material. One end of the rod is maintained at 1000 C and the other end is immersed in ice at 00 C. It is found that 28.5 g of ice melts in 4 minutes. Calculate the thermal conductivity of metal. Latent heat of fusion of ice = 80 cal g-1.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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