# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1728 - 1732 of 2320

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## Question number: 1728

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MCQ▾

### Question

V 1 and V 2 are the velocities of sound at the same temperature in two monoatomic gases of densities ρ 1 and ρ 2 respectively. If then the ratio of velocities V 1 and V 2 will be,

### Choices

Choice (4)Response

a.

4: 1

b.

1: 2

c.

2: 1

d.

1: 4

## Question number: 1729

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MCQ▾

### Question

In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.170 second. The frequency of the wave is,

### Choices

Choice (4)Response

a.

0.73 Hz

b.

0.36 Hz

c.

2.94 Hz

d.

1.47Hz

## Question number: 1730

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MCQ▾

### Question

The length of a simple pendulum is increased by 5%. Its time period will

### Choices

Choice (4)Response

a.

Increase by 2.5%

b.

Increase by 2%

c.

Increase by 3.5%

d.

Decrease by 5%

## Question number: 1731

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MCQ▾

### Question

A wave travelling in positive X-direction with A = 0.2m has a velocity of 360 m/sec. If λ = 60m, then correct expression for the wave is

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 1732

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MCQ▾

### Question

A wave represented by the given equation where x is in meter and t is in second. The expression represents,

(1) A wave travelling in the negative X direction with a velocity of 1.5 m/sec

(2) A wave travelling in the negative X direction with a wavelength of 0.2 m

(3) A wave travelling in the positive X direction with a velocity of 1.5 m/sec.

(4) A wave travelling in the positive X direction with a wavelength of 0.2 m

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

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