# Oscillations and Waves (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 4 - 7 of 27

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 268 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

## Question number: 4

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

Appeared in Year: 2011

MCQ▾

### Question

At 230C, a pipe open at both ends resonates at a frequency of 450 hertz. At what frequency does the same pipe resonate on a hot day when the speed of sound is 4 percent higher than it would be at 230C?

### Choices

Choice (4) Response

a.

454 Hz

b.

446 Hz

c.

459 Hz

d.

468 Hz

## Question number: 5

» Oscillations and Waves » Doppler Effect in Sound

Appeared in Year: 2011

MCQ▾

### Question

A speaker emits a sound wave of frequency f0. When it moves towards a stationary observer with speed u, the observer measures a frequency f1. If the speaker is stationary, and the observer moves towards it with speed v, the measured frequency is f2. Then –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 6

» Oscillations and Waves » Doppler Effect in Sound

Appeared in Year: 2010

MCQ▾

### Question

A bus driving along at 39.6 km/h is approaching a person who is standing at the bus stop, while honking repeatedly at an interval of 30 seconds. If the speed of the sound is 330 m/s, at what interval will the person hear the horn?

### Choices

Choice (4) Response

a.

29 seconds

b.

31 seconds

c.

30 seconds

d.

The interval will depend on the distance of the bus from the passenger

## Question number: 7

» Oscillations and Waves » Periodic Motion - Period Frequency

Appeared in Year: 2010

MCQ▾

### Question

A bead of mass m is attached to the mid-point of a taut, weightless string of length l and placed on a frictionless horizontal table.

Under a small transverse displacement x, as shown, if the tension in the string is T, then the frequency of oscillation is –

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page