Waves - Online Test
Q1. Velocity of sound in air is 300 m/s. Then the distance between two successive nodes of a stationary wave of frequency 1000 Hz is.
Answer : Option A
Explaination / Solution:
No Explaination.
Q2. There are three sources of sound of equal intensities with frequencies 400, 401 and 402 Hz. The number of beats per seconds is
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. The velocity of sound in gas in which two waves of wavelength 1.0 m and 0.01 m produces 4 beats/sec. is
Answer : Option D
Explaination / Solution:
No Explaination.
Q4. A fork of unknown frequency when sounded with another fork of frequency 256 Hz produces 4 beats/sec. The first fork is loaded with wax. It again produces 4 beats/sec. When sounded together with the fork of 256 Hz frequency, then the frequency of first tuning fork is
Answer : Option D
Explaination / Solution:
No Explaination.
Q5. Two tuning forks of frequencies 250 Hz produce beats. If a maximum is produced just now, after how much time the minimum is produced at the same place
Answer : Option D
Explaination / Solution:
No Explaination.
Q6. 56 tuning forks are arranged in a series that each fork gives 4 beats/sec, with the previous one. The frequency of last fork is 3 times that of first. Then frequency of first fork is
Answer : Option A
Explaination / Solution:
No Explaination.
Q7. A tuning fork produces 4 beats/sec. with 50 cm and 40 cm of a stretched wire, of a sonometer. The frequency of fork is
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. Two waves represented by Y1 = a1 sin wt and Y2 = a2 cos wt are superimposed at a point at a particular instant. The amplitude of resultant wave is
Answer : Option A
Explaination / Solution:
No Explaination.
Q9. The fundamental frequency of an open pipe is N keeping the pipe vertical. It is submerged in water so that half of its length is filled with water. The fundamental frequency of air column is
Answer : Option A
Explaination / Solution:
No Explaination.
Q10. If a star emitting orange light moves away from the earth, its color will
Answer : Option C
Explaination / Solution:
No Explaination.
