# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 27 - 34 of 2320

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## Question number: 27

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MCQ▾

### Question

A thin copper wire of length/metre increases in length by 2 % when heated through 10°C. Which is not the percentage increase in area when a square copper sheet of length/metre is heated through 10°C?

### Choices

Choice (4)Response

a.

12%

b.

14%

c.

16%

d.

4%

## Passage

The internal radius of a 1 m long resonance tube is measured as 3 cm. A tuning fork of frequency 2000 Hz is used. The first resonating length is measured as 4.6 cm and the second resonating length is measured as 14.0 cm.

## Question number: 28 (1 of 3 Based on Passage) Show Passage

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MCQ▾

### Question

Calculate the maximum percentage error in measurement of e.

### Choices

Choice (4)Response

a.

4.33%

b.

2.23%

c.

5.33%

d.

3.33%

## Question number: 29 (2 of 3 Based on Passage) Show Passage

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MCQ▾

### Question

Calculate the end correction.

### Choices

Choice (4)Response

a.

0.1 cm

b.

0.3 cm

c.

0.4 cm

d.

0.2 cm

## Question number: 30 (3 of 3 Based on Passage) Show Passage

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MCQ▾

### Question

Calculate the speed of sound at the room temperature.

### Choices

Choice (4)Response

a.

376 m/s

b.

275 m/s

c.

330 m/s

d.

356 m/s

## Question number: 31

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MCQ▾

### Question

the acceleration of a particle is increasing linearly with time t as bt. The particle starts from the origin with an initial velocity v0. The distance travelled by the particle in time t will be

### Choices

Choice (4)Response

a.

v 0 t + bt 2

b.

v 0 t + bt 2

c.

v 0 t + bt 3

d.

v 0 t + 1 3 bt 3

## Question number: 32

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MCQ▾

### Question

If the displacement of a particle is (5t 2 + 2t + 5) meter then, what will be ace. at t = 5 second?

### Choices

Choice (4)Response

a.

20 m/s 2

b.

4 m/s 2

c.

21 m/s 2

d.

1 0 m/s 2

## Question number: 33

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MCQ▾

### Question

If the displacement of a particle is (2t 2 + t + 5) meter then, what will be ace. at t = 5 second?

### Choices

Choice (4)Response

a.

21 m/s 2

b.

10 m/s 2

c.

20 m/s 2

d.

4 m/s 2

## Question number: 34

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MCQ▾

### Question

the displacement x of a particle varies with time t, x = a + b , where a, b, α and β are positive constants.

The velocity of the particle will

### Choices

Choice (4)Response

a.

Be independent of α and β

b.

Drop to zero when α = β

c.

Go on decreasing with time

d.

Go on increasing with time

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