Properties of Solids & Liquids (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 58 - 61 of 190

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Question number: 58

» Properties of Solids & Liquids » Latent Heat

MCQ▾

Question

A lead bullet at 25°C just n tits when stopped by an obstacle. Assuming that 25 % of heat is absorbed by the obstacle, then the velocity of the bullet at the time of striking (M. P. of lead = 320°C, specific heat of lead = 0.02 cal/gm°C, latent heat of fusion of lead = 6 cal/gm and J = 4.2 joule/cal)

Choices

Choice (4) Response

a.

4.010 m/sec

b.

0.365 m/sec

c.

307.5 m/sec

d.

None of the above

Question number: 59

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

A 4.0 m long copper wire of cross sectional area 1.2 cm 2 is stretched by a force of 4.8 × 10 3 N stress will be -

Choices

Choice (4) Response

a.

4.0 × l0 7 N/mm 2

b.

4.0 × l0 7 KN/m 2

c.

4.0 × l0 7 N/m 2

d.

None of the above

Question number: 60

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The apparent coefficient of expansion of a liquid when heated in a copper vessel is C and when heated in a silver vessel is S. If A is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 61

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

An iron tire is to be fitted on to a wooden wheel 1 m in diameter. The diameter of tire is 6mm smaller than that of wheel. The tire should be heated so that its temperature increases by a minimum of (the coefficient of cubical expansion of iron is 3.6 × 10 -5 /°C)

Choices

Choice (4) Response

a.

500°C

b.

167°C

c.

334°C

d.

1000°C