# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1405 - 1407 of 2184

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## Passage

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: 1405 (2 of 2 Based on Passage) Show Passage

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MCQ▾

### Question

The force exerted by mercury drop on the surface P is

### Choices

Choice (4) Response

a.

1.3456 N

b.

0.10086 N

c.

0.3 N

d.

0.10023 N

## Question number: 1406

» Properties of Solids & Liquids » Heat Transfer » Radiation

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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.

1,2 and 3 are correct

c.

1 and 2 are correct

d.

2 and 4 are correct

## Question number: 1407

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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.

200 gm of ice

c.

20 gm of ice

d.

2 kg of ice