Problem 1C A sinusoidal voltage having a peak value of 160 V and frequency of 50 Hz is applied to the terminals of an ac motor. The resulting current has a peak value of 7.5 A and lags 40° behind the voltage. a. Express current and voltage in term of the electrical angle. b. Calculate the value of the instantaneous power at 120°.

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Problem 1C

A sinusoidal voltage having a peak value of 160 V and frequency of 50 Hz is applied to the terminals of an ac motor. The resulting current has a peak value of 7.5 A and lags 40° behind the voltage.


a. Express current and voltage in term of the electrical angle.

b. Calculate the value of the instantaneous power at 120°.

 

A sinusoidal voltage having a peak value of 160 V and frequency of 50 Hz is
applied to the terminals of an ac motor. The resulting current has a peak
value of 7.5 A and lags 40° behind the voltage.
a. Express current and voltage in term of the electrical angle.
b. Calculate the value of the instantaneous power at 120°.
Transcribed Image Text:A sinusoidal voltage having a peak value of 160 V and frequency of 50 Hz is applied to the terminals of an ac motor. The resulting current has a peak value of 7.5 A and lags 40° behind the voltage. a. Express current and voltage in term of the electrical angle. b. Calculate the value of the instantaneous power at 120°.
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