Calculate the active power in a 19 F capacitor.(a) 7.8 W(b) 0 W(c) 5.4 W(d) 1.5 WThe question was posed to me at a job interview.The question is from DC Motors topic in chapter Characteristics of DC & AC Motors of Electric Drives

Calculate the active power in a 19 F capacitor.(a) 7.8 W(b) 0 W(c) 5.4

1.	Calculate the active power in a 19 F capacitor.(a) 7.8 W(b) 0 W(c) 5.4 W(d) 1.5 WThe question was posed to me at a job interview.The question is from DC Motors topic in chapter Characteristics of DC & AC Motors of Electric Drives
Answer» Correct choice is (b) 0 W For explanation I would SAY: The CAPACITOR is a linear element. It only absorbs reactive power and stores it in the form of oscillating energy. The voltage and current are 90° in phase in case of the capacitor so the ANGLE between V & I is 90°. P = VIcos90 = 0 W. Current leads the voltage in case of the capacitor.

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