# Oscillations and Waves (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 135 - 139 of 195

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2144 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

How to register?

## Question number: 135

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

MCQ▾

### Question

Three masses 600g, 300g, and 200g are suspended at the end of a spring are in equilibrium. When the 600g mass is removed, the system oscillates with a period of 4 seconds, when the 300 gm mass is also removed, it will oscillate with a period of

### Choices

Choice (4) Response

a.

2 s

b.

1 s

c.

d.

2.53 s

## Question number: 136

» Oscillations and Waves » Speed of a Wave

MCQ▾

### Question

A man is standing between two parallel cliffs and fires a gun. If he hears first and second echoes after 1.5 s and 3.5s respectively, the distance between the cliffs is (Velocity of sound in air = 340 ms -1)

### Choices

Choice (4) Response

a.

510 m

b.

850 m

c.

595 m

d.

1190 m

## Question number: 137

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

### Question

The equation of a progressive wave is given by where x and y are in meter and t is in second. The velocity of the wave is,

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 138

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

### Question

The relation between time and displacement for two particles is given by

,

The ratio of the intensities of the waves produced by the vibrations of the two particles will be

### Choices

Choice (4) Response

a.

1: 9

b.

9: 1

c.

1: 2

d.

2: 1

## Question number: 139

» Oscillations and Waves » Reflection of Waves

Assertion-Reason▾

### Assertion (Ꭺ)

Sound from a tuning fork is louder when its stem is placed on a desktop

### Reason (Ꭱ)

When a wave reaches another denser medium some part of it is reflected.

### Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

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