# Oscillations and Waves (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 188 - 192 of 195

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## Question number: 188

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

### Question

An observer is moving away from source of sound of frequency 100 Hz. His speed is 33 m/s. If speed of sound is 330 m/s, then the observed frequency is

### Choices

Choice (4) Response

a.

90 Hz

b.

91 Hz

c.

100 Hz

d.

110 Hz

## Question number: 189

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

### Question

A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m/s. The frequency heard by the observer in Hz is

### Choices

Choice (4) Response

a.

409

b.

517

c.

429

d.

500

## Question number: 190

» Oscillations and Waves » Harmonics

MCQ▾

### Question

A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance 1.21 A between them. The wavelength of the standing wave is

### Choices

Choice (4) Response

a.

6.05 Å

b.

1.21 Å

c.

2.42 Å

d.

3.63 Å

## Question number: 191

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

Appeared in Year: 2016

MCQ▾

### Question

A body of mass is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass is slightly pilled down and released, it oscillates with a time period of . When the mass is increased by 1 kg, the time period of oscillation becomes . The value of in is:

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 192

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

Appeared in Year: 2016

MCQ▾

### Question

The second overtone of an open organ pipe has the same frequency as the first overtone of a closed pipe L meter long. The length of the open pipe will be –

### Choices

Choice (4) Response

a.

b.

c.

d.