Sounds Waves And Motion - Study Mode

[#81] Wave, speed, amplitude, wavelength and frequency all are called-
Correct Answer

(B) Characteristics of wave

[#82] A particle is executing simple harmonic motion. Which one of the following statements about the acceleration of the oscillating particle is true?
Correct Answer

(C) It is minimum when the speed is maximum

[#83] The wave length is usually indicated in the Greek Letter-
Correct Answer

(B) Lambda

[#84] Assertion (A) The velocity of sound in air increases due to the presence of moisture in it. Reason (R) The presence of moisture in air lowers the density of air.
Correct Answer

(A) Both A and R are true and R is the correct explanation of A

[#85] Calculate the time period (in seconds) of a sound wave of wave length 5 metre travelling with a speed of 500 m/s.
Correct Answer

(A) 0.01