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AC circuit voltage can be described using a sine wave with the equation??

Discussion in 'Electronics Homework Help' started by Andrew Younger, Jan 11, 2017.

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  1. Andrew Younger

    Andrew Younger

    2
    0
    Jan 11, 2017
    Hi I am having a bit of trouble with a question and hoping I may be able to get a few pointers in the right direction.

    The question is:
    In an AC circuit the voltage can be described using a sine wave with the equation: v = 150sin (60 pi t + 0.6) V

    I need to work out
    a. the frequency
    b. the amplitude
    c. the relative phase

    I know that the amplitude is 150v so that is (b) taken care of, I am now unsure how to work out the following despite scouring the internet and my reading material. Does anyone know what the numbers in the brackets stand for?

    Thanks
     
  2. Alec_t

    Alec_t

    2,950
    803
    Jul 7, 2015
    v = amplitude x sin((2 x pi x frequency x time) + phase).
    Compare that equation with the one you have been given.
    Welcome to EP.
     
  3. Kabelsalat

    Kabelsalat

    157
    29
    Jul 5, 2011
    Here is the output curve, compared with a similar one without phase shift:

    It is much easier to understand by seeing the function curve.
     

    Attached Files:

  4. Laplace

    Laplace

    1,252
    184
    Apr 4, 2010
    The quantity in the parentheses is given in radians. There are 2π radians in 360°. So are you expected to give the frequency in radian measure or in Hz? Phase shift in radians or degrees?
     
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