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In: Physics

Write an expression for the instantaneous voltage ?(?) delivered by an ac generator supplying 120 V...

Write an expression for the instantaneous voltage ?(?) delivered by an ac generator supplying 120 V rms at 70 Hz. Assume the voltage is 0 at time ?=0, and leave the factors in exact form; do not round their values. Write the argument of the sinusoidal function to have units of radians, but omit the units.

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Expert Solution

solution : As we know that

and = ​ and ​​​​​​

  where is instantaneous voltage , is maximum voltage , is angular frequency , is time and is initial phase or argument, is root mean square of voltage , is frequency of a.c. generator.

Given ; ; at       ;

  

hence, = 0;

  

     (putting value of and = 22/7)

hence

  

genius_generous answered 2 years ago
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