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Calculate the quality factor for the R-C circuit if R=1 Ω and C=1 F.(a) 2(b) 4(c) 1(d) 5The question was posed to me during an interview.The above asked question is from Dynamic Braking of DC Shunt Motors topic in section Braking of DC Motors & Induction Motors of Electric Drives

Answer»

Right choice is (c) 1

Easy explanation: The QUALITY factor is defined as the ratio of the reactive POWER to the ACTIVE power CONSUMED. The resistor always ABSORBS active power and capacitor absorbs the reactive power. Quality factor=1÷RC=1÷1=1.



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