Oscillations and Waves (AIIMS Physics): Questions 34 - 38 of 50

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 500 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 350.00 or

Question number: 34

» Oscillations and Waves » Harmonics

MCQ▾

Question

Two sounds in a gas differ in their loudness level by 40 db. What is the ratio of the amplitude of the pressure oscillations?

Choices

Choice (4) Response

a.

10:1

b.

100:1

c.

104:1

d.

10:1

Question number: 35

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

MCQ▾

Question

If vibrations of a string are to be increased to a factor of six, then tension in the string must be made –

Choices

Choice (4) Response

a.

3 times

b.

9 times

c.

36 times

d.

6 times

Question number: 36

» Oscillations and Waves » Periodic Functions

MCQ▾

Question

In an experiment, on the measurement of g , by a simple pendulum, the time period was measured with an accuracy of 0.1 % and the length was measured with an accuracy of x% . The resultant value of g obtained with accuracy 0.5% . Than find the value of x .

Choices

Choice (4) Response

a.

0.2%

b.

0.4%

c.

0.3%

d.

0.5%

Question number: 37

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A vehicle, with a horn of frequency n is moving with a velocity of 45ms in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n+n1 . Then – (Take velocity of sound in air 300 m/s)

Choices

Choice (4) Response

a.

n1=13n

b.

n1=0.13n

c.

n1=0

d.

n1=1.3n

Question number: 38

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A siren emitting sound of frequency 750 Hz is going away form a static listener with a speed of 40msec . The frequency of sound to be heard directly from the siren is –

Choices

Choice (4) Response

a.

530 Hz

b.

669 Hz

c.

489 Hz

d.

344 Hz

Sign In