Properties of Solids & Liquids (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 82 - 85 of 190

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Question number: 82

» Properties of Solids & Liquids » Heat Transfer » Convection

MCQ▾

Question

For cooking the food, which of the following type of utensil is most suitable

Choices

Choice (4) Response

a.

Low specific heat and high conductivity

b.

High specific heat and low conductivity

c.

Low specific heat and low conductivity

d.

High specific heat and high conductivity

Question number: 83

» Properties of Solids & Liquids » Heat Transfer » Radiation

MCQ▾

Question

Consider two hot bodies B 1 and B 2 which have temperature 100° C and 80° C respectively at t = 0. The temperature of surroundings is 40° C. The ratio of the respective rates of cooling R 1 and R 2 of these two bodies at t = 0 will be,

Choices

Choice (4) Response

a.

R 1: R 2 = 3: 2

b.

R 1: R 2 = 2: 3

c.

R 1: R 2 = 5: 4

d.

R 1: R 2 = 4: 5

Question number: 84

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

A rod of length 20 cm is made of metal. It expands by 0.075 cm when its temperature is raised from 0°C to 100°C. Another rod of a different metal B having the same length expands by 0.045 cm for the same change in temperature. A third rod of the same length is composed of two parts, one of metal A and the other of metal B. This rod expands by 0.060 cm for the same change in temperature. The portion made of metal A has the length

Choices

Choice (4) Response

a.

10 cm

b.

15 cm

c.

18 cm

d.

20 cm

Question number: 85

» Properties of Solids & Liquids » Modulus of Rigidity

MCQ▾

Question

The compressibility of water is 5 × 10 -10 m 2 /N. If it is subjected to a pressure of 20 MPa the fractional decrease in volume will be -

Choices

Choice (4) Response

a.

7.5 ×10 -3

b.

5.0 × 10 -3

c.

1.5 × 10 -2

d.

3.3 × 10 -5

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