The number of oscillations or vibrations per second is called the ___________ of oscillation

Correct option is B

Ans (b)
Sol. Wavelength: This refers to the distance between two consecutive peaks or troughs of a wave. It is related to the wave's size or length, but not to the number of oscillations per second.
Frequency: Frequency is the number of oscillations or vibrations that occur per second, measured in Hertz (Hz). It defines the rate of repetition of the wave.
Shrillness: This term refers to the perceived pitch of a sound, which is related to the frequency but is not the technical term for the number of oscillations per second.
Amplitude: Amplitude refers to the maximum displacement or height of a wave from its equilibrium position. It is related to the intensity or loudness of sound, not to the number of oscillations.