NEET Physics: Questions 1404 - 1407 of 2098

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2098 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Passage

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

There is a small mercury drop of radius 5.0 mm. A surface P of area 2.0 mm 2 is placed at the top of the drop. Atmospheric pressure = 10 5 Pa. Surface tension of mercury = 0.465 N/m. Gravity effect is negligible.

Question number: 1404 (2 of 2 Based on Passage) Show Passage

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

Question

The force exerted by air on surface P is

Choices

Choice (4) Response

a.

0.2 N

b.

0.1 N

c.

1.0023 N

d.

2.0 N

Question number: 1405

» Properties of Solids & Liquids » Heat Transfer » Radiation

MCQ▾

Question

Two bodies A and B have thermal emissivity of 0.01 and 0.81 respectively. The outer surface areas of the two bodies are the same. The two bodies emit total radiant power at the same rate. The wavelength λ B corresponding to maximum spectral radiance in the radiation from B is shifted from the wavelength corresponding to maximum spectral radiance in the radiation from A, by 1.00 µm. If the temperature of A is 5802 K

(1) The temperature of B is 1934 K

(2) λ B = 1.5 μm

(3) The temperature of B is 11604 K

(4) The temperature of B is 2901 K

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

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

2 and 4 are correct

Question number: 1406

» Properties of Solids & Liquids » Latent Heat

MCQ▾

Question

A stationary object at 4° C and weighing 3.5 kg falls from a height of 2000 m on a snow mountain at 0° C. If the temperature of the object just before hitting the snow is 0°C and the object comes to rest immediately? (g = 10 m/s 2 and latent heat of ice = 3.5 × 10 5 joule/sec), then the object will melt

Choices

Choice (4) Response

a.

2 gm of ice

b.

2 kg of ice

c.

20 gm of ice

d.

200 gm of ice

Question number: 1407

» Properties of Solids & Liquids » Heat Transfer » Radiation

MCQ▾

Question

A body cools from 90° C to 50° C in 10 minutes. If the room temperature is 25° C and assuming Newton’s law of cooling to hold good, the temperature of the body at the end of the next 10 minutes will be

Choices

Choice (4) Response

a.

56.40° C

b.

34.61° C

c.

46.75° C

d.

42.85° C

f Page
Sign In