# Oscillations and Waves-Speed of a Wave (AIIMS (All India Institute of Medical Sciences) Physics): Questions 1 - 5 of 7

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## Question number: 1

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2002

MCQ▾

### Question

A string in a musical instrument is 50 cm long and its fundamental frequency is 800 Hz. If a frequency of 1000 Hz is to be produced, then required length of string is –

### Choices

Choice (4) Response

a.

20 cm/s

b.

200 cm/s

c.

100 cm/s

d.

50 cm/s

## Question number: 2

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2001

MCQ▾

### Question

The tension in a piano wire is 10N. What should be the tension in the wire to produce a note of double the frequency?

### Choices

Choice (4) Response

a.

20N

b.

40N

c.

80N

d.

10N

## Question number: 3

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2002

MCQ▾

### Question

The velocities of sound at the same pressure in two monatomic gases of densities and are and respectively. If, then the value of is?

### Choices

Choice (4) Response

a.

2

b.

c.

4

d.

## Question number: 4

» Oscillations and Waves » Speed of a Wave

MCQ▾

### Question

The tension in a piano wire is 20N. What should be the tension in the wire to produce a note of three times of the frequency?

### Choices

Choice (4) Response

a.

110N

b.

120N

c.

180N

d.

140N

## Question number: 5

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2002

Assertion-Reason▾

### Assertion (Ꭺ)

The flash of lighting is seen before the sound of thunder is heard.

### Reason (Ꭱ)

Speed of sound is greater than speed of light.

### Choices

Choice (4) Response

a.

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

b.

Ꭺ is true but Ꭱ is 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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