Properties of Solids & Liquids (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 120 - 125 of 190

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Question number: 120

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The temperature of equal masses of three different liquids A, B and C are 12 °C, 19 °C and 28°C respectively. The temperature when A and B are mixed is 26°C and who and C are mixed is 32 °C. The temperature when A and C are mixed is

Choices

Choice (4) Response

a.

20.2°C

b.

22°C

c.

25.86°C

d.

18.2°C

Passage

Read the passage given below and answer the questions that follow:

There is a small mercury drop of radius 4.0 mm. A surface P of area 1.0 mm 2 is placed at the top of the drop. Atmospheric pressure = 10 5 Pa. Surface tension of mercury = 0.465 N/m. Gravity effect is negligible.

Question number: 121 (1 of 2 Based on Passage) Show Passage

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

Question

The force exerted by mercury drop on the surface P is

Choices

Choice (4) Response

a.

1.0023 N

b.

0.00023 N

c.

0.10023 N

d.

0.1 N

Question number: 122 (2 of 2 Based on Passage) Show Passage

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

Question

The force exerted by air on surface P is

Choices

Choice (4) Response

a.

0.1 N

b.

1.0N

c.

1.0023 N

d.

10 5 N

Question number: 123

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

MCQ▾

Question

A candle of diameter d is floating on a liquid in a cylindrical container of diameter D (D > > d). If it is burning at the rate of 2 cm/hour then the top of the candle will,

Choices

Choice (4) Response

a.

Fall at the rate of 2 cm/hour

b.

Fall at the rate of 1 cm/hour

c.

Remain at the same height

d.

Go up the rate of 1 cm/hour

Question number: 124

» Properties of Solids & Liquids » Young's Modulus

MCQ▾

Question

The Young’s modulus of steel is 2 × 10 11 N/m 2 and its coefficient of linear expansion is 1.1 × 10 -5 per deg. The pressure to be applied to the ends of a steel cylinder to keep its length constant on raising its temperature by 100°C, will be -

Choices

Choice (4) Response

a.

1.8 × 10 6 N/m 2

b.

5.5 × 10 4 N/m 2

c.

2.0 × 10 11 N/m 2

d.

2.2 × 10 8 N/m 2

Question number: 125

» Properties of Solids & Liquids » Heat Transfer » Radiation

MCQ▾

Question

The rates of cooling of two different liquids put in exactly similar calorimeters and kept in identical surroundings are the same if

Choices

Choice (4) Response

a.

Different volumes of the liquids at the same temperature are taken

b.

Equal volumes of the liquids at the same temperature are taken

c.

Equal masses of the liquids at the same temperature are taken

d.

The masses of the liquids are equal

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