Properties of Solids & Liquids-Heat Transfer (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 25 - 28 of 40

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 25

» Properties of Solids & Liquids » Heat Transfer » Convection

MCQ▾

Question

Two rods A and B are of equal lengths. Their ends are kept between the same temperature and their areas of cross-sections are A 1 and A 2 and thermal conductivities K 1 and K 2. The rate of heat transmission in the two rods will be equal, if

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 26

» 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

Question number: 27

» Properties of Solids & Liquids » Heat Transfer » Convection

MCQ▾

Question

The rate of loss of heat from a body cooling under conditions of forced convection is proportional to its

(1) Surface area

(2) Excess of temperature over that of surrounding

(3) Heat capacity

(4) Absolute temperature

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

2 and 4 are correct

c.

1 and 2 are correct

d.

1,2 and 3 are correct

Question number: 28

» Properties of Solids & Liquids » Heat Transfer » Radiation

MCQ▾

Question

A black body is at a temperature of 2550 K. The energy of radiation emitted by this object with wavelength between 499 nm and 500 nm is U 1 between 999 nm and 1000 nm is U 2 and between 1499 nm and 1500 nm is U 3. The Wein’s constant b = 2.88 × 10 6 nm K. Then

Choices

Choice (4) Response

a.

b.

c.

d.

f Page
Sign In