Question

Read the passage and answer the following question: Sound is produced due to vibration. The to and fro motion of an object is known as vibration.  This motion is also known as oscillatory motion. Time to complete one oscillation is known as its time period. Frequency and amplitude of the oscillation are characteristics of sound. A frequency of 1 Hz is one oscillation per second. Loudness of sound is proportional to the square of the amplitude of the vibration producing the sound.  Two vibrating objects  P and Q produce 20 oscillations in 2 s and 90 oscillations in 5 s, respectively. Which of the following statements is correct about frequency of vibrations of objects P and Q?

1.Frequency of vibrations produced by object P is 18 Hz.
2.Frequency of vibrations produced by object Q is 10 Hz.
3.Frequency of vibrations produced by object Q is less than that of P.
4.Frequency of vibrations produced by object P is less than that of Q.​

Answer 1

Answer:

.4

Explanation:

p produces 20 oscillation in 2s so,frequency is 20/2=10

q produces 90 oscillation in 5s so,frequency is 90/5=18

then, frequency of vibrations produced by object p is less than that of q