question_answer

Two sinusoidal voltages of the same frequency are shown in the diagram. What is the frequency, and the phase relationship between the voltages Frequency in Hz Phase lead of N over M in radians

A)            0.4  \[-\pi /4\]

B)            2.5  \[-\pi /2\]

C)            2.5  \[+\pi /2\]

D)            2.5  \[-\pi /4\]

Correct Answer: B

Solution :

                   From the graph shown below. It is clear that phase lead of N over M is \[-\frac{\pi }{2}\]. Since time period (i.e. taken to complete one cycle) = 0.4 sec.                    Hence frequency \[\nu =\frac{1}{T}=2.5\,Hz\]