The average power input to a series alternating current circuit is maximum when:?

Posted on 2016-04-04 18:46:00 in Engineering by MIANI

a) there are only a resistor and capacitor in the circuit. 
b) XL = XC and the circuit contains a resistor, an inductor and a capacitor. 
c) there are only a resistor and inductor in the circuit. 
d) there is only a inductor in the circuit. 
e) there is only a capacitor in the circuit. 

i know the answer is e if the question asks for a minimum instead of a maximum

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