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  • Calculate power (in watts) when rms value of voltage and current are 220v & 3A respectively. Phase between voltage of current is <img alt="\frac{\pi}{4}" src="http://entrancecorner.oncodec

Calculate power (in watts) when rms value of voltage and current are 220v & 3A respectively. Phase between voltage of current is \frac{\pi}{4}

Option: 1

466.76


Option: 2

660


Option: 3

330


Option: 4

233.38


Answers (1)

best_answer

As we learnt,

 

Average power (True power) -

P_{av}= V_{rms}\: \: i_{rms}\cos \phi

-

 

 

 P = V_{rms}I_{rms}\cos\phi

 

= 220\times 3\times \cos\frac{\pi}{4} = 466.76 W

 

Posted by

sudhir kumar

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