# Oscillations and Waves (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 121 - 126 of 195

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## Question number: 121

» Oscillations and Waves » Wave Motion

MCQ▾

### Question

A tuning fork makes 125 vibrations per second in air. When the velocity of sound is 330 m/s then wavelength of the tone emitted is

### Choices

Choice (4) Response

a.

2.56 m

b.

2.29 m

c.

1.89 m

d.

2.64 m

## Question number: 122

» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring

MCQ▾

### Question

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then the short piece will have a force constant of

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 123

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

### Question

The equation of a wave is given as .

Where x is in meter and t in sec, then the correct statement is,

### Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

## Question number: 124

» Oscillations and Waves » Simple Pendulum

MCQ▾

### Question

The length of a simple pendulum is increased by 1%. Its time period will

### Choices

Choice (4) Response

a.

Increase by 2%

b.

Increase by 0.5%

c.

Decrease by 0.5%

d.

Increase by 1%

## Question number: 125

» Oscillations and Waves » Simple Pendulum

MCQ▾

### Question

A simple pendulum consisting of a ball of mass m tied to a thread of length l is made to swing on a circular arc of angle θ in a vertical plane. At the end of this arc, another ball of mass m is placed at rest. The momentum transferred to this ball at rest by the swinging ball is

### Choices

Choice (4) Response

a.

1

b.

c.

Zero

d.

## Question number: 126

» Oscillations and Waves » Speed of a Wave

Assertion-Reason▾

### Assertion (Ꭺ)

Sound travels faster during a clear sunny day than during a clear night.

### Reason (Ꭱ)

The velocity of sound is directly proportional to the square of temperature of the medium.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

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