# Properties of Solids & Liquids-Heat Transfer (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 4 of 40

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## Question number: 1

» Properties of Solids & Liquids » Heat Transfer » Convection

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 36°C. Then the difference of temperature at the two surfaces of A will be

### Choices

Choice (4) Response

a.

12°C

b.

24°C

c.

6°C

d.

18°C

## Question number: 2

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

### Question

While measuring the thermal conductivity of a liquid, we keep the upper part hot and lower part cool, so that

### Choices

Choice (4) Response

a.

It is easier and more convenient to do so

b.

Convection may be stopped

c.

Heat conduction is easier downwards

d.

## Question number: 3

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

### Question

Four rods of identical cross-sectional area and made from the same metal form the sides of square. The temperature of two diagonally opposite points are T and √2T respectively in the steady state. Assuming that only heat conduction takes place, what will be the temperature difference between other two points

### Choices

Choice (4) Response

a.

b.

0

c.

d.

All of the above

## Question number: 4

» Properties of Solids & Liquids » Heat Transfer » Radiation

Assertion-Reason▾

### Assertion (Ꭺ)

The absorbance of a perfect black body is unity.

### Reason (Ꭱ)

A perfect black body when heated emits radiations of all possible wavelengths at that temperature.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is false but Ꭱ is true