If the output voltage is at a maximum value (magnitude) at t=0, when is it next

Question

If the output voltage is at a maximum value (magnitude) at t=0, when is it next a maximum (magnitude)? When is it next at its initial value (direction and magnitude)?

HOW do you solve for c?

C Exercise 20.16 Part A A hospital emergency room ac generator operates at a frequency of 60 Hz If the output voltage is at a maximum value (magnitude) at t = 0, when is it next a maximum (magnitude)? t= 8.33x10-3 s Submit My Answers Give Up Correct Part B When is it next a zero magnitude? | t= 4.17x10-3 s Submit My Answers Give Up Correct Part C When is it next at its initial value (direction and magnitude)? t= 1.67×10-2 s Submit My Answers Give Up Correct

Explanation / Answer

Solution For c)

It is next at its initial value ( both direction and magnitude )   after its full time period .

( we can consider it as a cosine wave (cos t) which has maximum value at t = 0 ) .

=>    Time period =   1/frequency

            = 1/60   =   1.67 * 10-2 sec

=>   the time is 1.67 * 10-2 sec .

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