Properties of Solids & Liquids (NEET Physics): Questions 34 - 38 of 188

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Question number: 34

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

Question

A solid copper sphere (density ρ and specific heat capacity c) of radius r at an initial temperature 200 K is suspends inside a chamber whose walls are at almost 0 K. The time required (in µ s) for the temperature of the sphere to drop to 100 K is

Choices

Choice (4) Response

a.

277rρcσ

b.

772rρcσ

c.

727rρcσ

d.

727rρcσ

Question number: 35

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The coefficient of volumetric expansion of mercury is 18 × 10 -5 / o C. A thermometer bulb has a volume 10 -6 m 3 and cross section of stem is 0.006 cm 2. Assuming that bulb is filled with mercury at 0°C then the length of the mercury column at 100°C is

Choices

Choice (4) Response

a.

9.2 mm

b.

0.03 m

c.

4.5 cm

d.

7.4 m

Question number: 36

» Properties of Solids & Liquids » Stress-Strain Relationship

MCQ▾

Question

A wire of length lm is stretched by a force of 10 N. The area of cross-section of the wire is 2 × 10 6 m 2 and Y is 2 × lO -6 N/m 2. Increase in length of the wire will be -

Choices

Choice (4) Response

a.

2.5 × 10 -5 mm

b.

2.5 × 10 -5 cm

c.

2.5 × 10 -5 m

d.

Question does not provide sufficient data or is vague

Passage

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

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: 37 (1 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: 38 (2 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

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