Properties of Solids & Liquids (NEET Physics): Questions 186 - 188 of 188

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Question number: 186

» Properties of Solids & Liquids » Heat Transfer » Convection

Appeared in Year: 2016

MCQ▾

Question

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100°C , while the other one is at 0°C. If the two bodies are brought into contact, then assuming no heat loss, the final common temperature is –

Choices

Choice (4) Response

a.

More then 50°C

b.

Less than 50°C but greater than 0°C

c.

50°C

d.

0°C

Question number: 187

» Properties of Solids & Liquids » Newton's Law of Cooling

Appeared in Year: 2016

MCQ▾

Question

A body cools from a temperature 3T to 2T in 10 minutes. The room temperature is T. Assume that Newton’s law of cooling is applicable. The temperature of the body at the end of next 10min will be –

Choices

Choice (4) Response

a.

74T

b.

43T

c.

T

d.

32T

Question number: 188

» Properties of Solids & Liquids » Application of Surface Tension

Appeared in Year: 2016

MCQ▾

Question

Three liquids of densities ρ1,ρ2 and ρ3 (with ρ1>ρ2>ρ3 ), having the same value of surface tension T, rise to the same height in three identical capillaries. The angle of contact θ1,θ2 and θ3 obey –

Choices

Choice (4) Response

a.

π2<θ1>θ2>θ3<π

b.

π2>θ1>θ2>θ30

c.

0θ1<θ2<θ3<π2

d.

π>θ1>θ2>θ3<π2

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