+91-8076753736 support@wiredfaculty.com

Sponsor Area

Waves

Question

Wired Faculty App

An observer moves towards a stationary source of the sound, with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency?

0

0.5%

5%

20%

Solution

D.

20%

straight f space equals space fraction numerator straight v plus straight v divided by 5 over denominator straight v end fraction straight f space equals fraction numerator 6 straight f over denominator 5 end fraction percent sign increase space in space frequency space equals space 20 percent sign

Some More Questions From Waves Chapter

Three sound waves of equal amplitudes have frequencies (ν – 1), ν, (ν + 1). They superpose to give beats. The number of beats produced per second will be.

When two tuning forks (fork 1 and fork 2) are sounded simultaneously, 4 beats per second are heard. Now, some tape is attached on the prong of the fork 2. When the tuning forks are sounded again, 6 beats per seconds are heard. If the frequency of fork 1 is 200 Hz, then what was the original frequency of fork 2?

The sound waves after being converted into electrical waves are not transmitted as such because

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation