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19 June, 05:56

The emf produced in a generator is Vemf = 25 sin 377t. What is the frequency of rotation of the circular coil?

50 Hz

60 Hz

25 Hz

15 HZ

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Answers (1)
  1. 19 June, 06:04
    0
    The emf produced in a generator is:

    Vemf=25sin (377t)

    Recall the standard equation which describes relation between amplitude and angular velocity.

    V=asin (ωt)

    so substitute the numbers into the equation

    Vemf=25sin (377)

    to find frequency use the equation

    f=w/2π

    so freq = 377/2π

    this will equal 60Hz
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