Properties of Solids & Liquids-Heat Transfer (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 9 - 13 of 40

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Passage

A brass ball of mass 100 gm is heated to 100°C and then dropped into 200 gm of turpentine in a calorimeter at 15°C. The final temperature is found to be 23°C. Take specific heat of brass as 0.092 cal/gm°C and water equivalent of calorimeter as 4 gm.

Question number: 9 (1 of 3 Based on Passage) Show Passage

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

Question

Heat gained by turpentine and calorimeter is approximately

Choices

Choice (4) Response

a.

511 cal

b.

815 cal

c.

704 cal

d.

620 cal

Question number: 10 (2 of 3 Based on Passage) Show Passage

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

Question

Heat lost by the ball is approximately

Choices

Choice (4) Response

a.

710 cal

b.

810 cal

c.

610 cal

d.

510 cal

Question number: 11 (3 of 3 Based on Passage) Show Passage

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

Question

The specific heat of turpentine is

Choices

Choice (4) Response

a.

0.72 cal/gm°c

b.

0.12 cal/gm°c

c.

0.42 cal/gm°c

d.

0.96 cal/gm°c

Question number: 12

» Properties of Solids & Liquids » Heat Transfer » Convection

MCQ▾

Question

A composite metal bar of uniform section is made up of length 15 cm of copper, 10 cm of nickel and 5 cm of aluminum. Each part being in perfect thermal contact with the adjoining part. The copper end of the composite rod is maintained at 100°C and the aluminum end at 0°C. The whole rod is covered with belt so that there is no heat loss occurs at the sides. If K Cu = 2K al and K a1 = 3K Ni, then what will be the temperatures of Cu - Ni and Ni - Al junctions respectively,

Choices

Choice (4) Response

a.

30°C and 50°C

b.

50°C and 30°C

c.

23.33°C and 78.8°C

d.

83.33°C and 20°C

Question number: 13

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

Question

A wall is made up of two layers A and B. The thickness of the two layers is the same, but materials are different. The thermal conductivity of A is double than that of B. In thermal equilibrium the temperature difference between the two ends is 30°C. Then the difference of temperature at the two surfaces of A will be

Choices

Choice (4) Response

a.

12°C

b.

10°C

c.

24°C

d.

18°C

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