# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1286 - 1291 of 2320

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## Question number: 1286

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MCQ▾

### Question

A thin metal disc of radius r floats on water surface and bends the surface downwards along the perimeter making an angle 9 with vertical edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight of metal disc is

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 1287

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MCQ▾

### Question

When a mica sheet (µ = 1.6) of thickness 7 microns is placed in the path of one of interfering beams in the biprism experiment then the central fringe gets shifted at the position of seventh bright fringe. The wavelength of light used will be –

### Choices

Choice (4)Response

a.

4000Å

b.

6000 Å

c.

7000 Å

d.

5000 Å

## Passage

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

In the figure n mole of a monoatomic ideal gas undergo the process ABC as shown in the P-V diagram. The process AB is isothermal and BC is isochoric. The temperature of the gas at A is T 0. Total heat given to the gas during the process ABC is measured to be Q.

## Question number: 1288 (1 of 3 Based on Passage) Show Passage

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

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MCQ▾

### Question

Heat absorbed by the gas in the process BC

### Choices

Choice (4)Response

a.

6nRT 0

b.

nRT 0

c.

3nRT 0

d.

2nRT 0

## Question number: 1289 (2 of 3 Based on Passage) Show Passage

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MCQ▾

### Question

The average molar heat capacity of the gas in process ABC is

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 1290 (3 of 3 Based on Passage) Show Passage

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

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MCQ▾

### Question

Temperature of the gas at C is equal to

### Choices

Choice (4)Response

a.

3T 0

b.

T 0

c.

2T 0

d.

6T 0

## Question number: 1291

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MCQ▾

### Question

A slit of size 0.15 cm is placed at 2.1 m from a screen. On illuminating it by a light of wavelength 5 × 10 -5 cm, the width of central maxima will be

### Choices

Choice (4)Response

a.

70 mm

b.

0.14 mm

c.

1.4 mm

d.

0.14 cm

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