# Oscillations and Waves (AIIMS Physics): Questions 24 - 27 of 50

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## Question number: 24

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

MCQ▾

### Question

A string in a musical instrument is 80 cm long and its fundamental frequency is 1000 Hz. If a frequency of 1400 Hz is to be produced, then required length of string is –

### Choices

Choice (4) Response

a.

62.4 cm

b.

57.1 cm

c.

65 cm

d.

72.3 cm

## Question number: 25

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

MCQ▾

### Question

A standing wave having 4 nodes and 3 antinodes is formed between distances then the wavelength is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 26

» Oscillations and Waves » Displacement Relation for a Progressive Wave

MCQ▾

### Question

If equation of a sound wave is then its wavelength will be –

### Choices

Choice (4) Response

a.

1 unit

b.

0.09 unit

c.

0.05 unit

d.

0.5 unit

## Question number: 27

» Oscillations and Waves » Longitudinal and Transverse Waves

Appeared in Year: 2003

Assertion-Reason▾

### Assertion (Ꭺ)

When a beetle moves along the sand within a few tens of centimeters of a sand scorpion, the scorpion immediately turns towards the beetle and dashes towards it.

### Reason (Ꭱ)

When a beetle disturbs the sand, it sends pulses along the sand’s surface. One set of pulses is longitudinal while the other set is transverse.

### Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

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

d.

Ꭺ is false but Ꭱ is true

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