# Oscillations and Waves (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 151 - 155 of 195

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## Question number: 151

» 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.

## Passage

A particle performs linear SHM such that it is placed on platform-1 & platform-2 along with particles up and down with amplitude A = 8 cm. If the particle does not loose contact with platform anywhere and mass of particle is 2 kg, find:

## Question number: 152 (1 of 1 Based on Passage) Show Passage

» Oscillations and Waves » Periodic Functions

MCQ▾

### Question

The minimum, possible time period (Take )

### Choices

Choice (4) Response

a.

0.1 sec.

b.

0.2 sec.

c.

0.4 sec.

d.

0.3 sec.

## Question number: 153

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

### Question

Doppler shift in frequency depends upon

### Choices

Choice (4) Response

a.

The velocity of the observer

b.

The frequency of the wave produced

c.

The velocity of the source

d.

All c. , a. and b. are correct

## Question number: 154

» Oscillations and Waves » Standing Waves in Strings and Organ Pipes

MCQ▾

### Question

An open organ pipe is in resonance in its 2 nd harmonic with tuning fork of frequency f 1 now; it is closed at one end. If the frequency of the tuning fork is increased slowly from f l then again a resonance is obtained with a frequency f 2. If in this case the pipe vibrates n th harmonics then

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 155

» Oscillations and Waves » Reflection of Waves

Assertion-Reason▾

### Assertion (Ꭺ)

Velocity of particles, while crossing mean position (in stationary waves) varies from maximum at antinodes to zero at nodes.

### Reason (Ꭱ)

Amplitude of vibration at antinodes is maximum and at nodes, the amplitude is zero, and all particles between two successive nodes cross the mean position together.

### Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

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