Question

Suppose that during any period of ¼ second there is one instant at which the crests or troughs of component waves are exactly in phase and maximum reinforcement occurs. How many beats will occur in 1 second? A. 4
B. 8
C. 12
D. 2

Answer 1

Answer;

A. 4

Explanation;

• The period of a wave or periodic time is the time taken for a complete oscillation to occur. For example its is the time taken between two successive crests or troughs.
• The beats or oscillation that occur in one second represents the frequency. Frequency is the number of complete oscillations or beats in one second in a wave.
• Frequency, measured in Hertz is given by the reciprocal of the periodic time.
• Thus; Frequency or beats per second = 1/(1/4) = 4
• Hence , 4 beats per second