RLC Circuits and Resonance - Engineering

Q1:

A 6.8 k resistor, a 7 mH coil, and a 0.02 F capacitor are in parallel across a 17 kHz ac source. The coil's internal resistance, RW, is 30 . The equivalent parallel resistance, Rp(eq), is

A 1,878 

B 18,780 

C 18,750 

D 626 

ANS:B - 18,780 

Here, we didn't find the equivalent resister of parallel circuit. Without resistor place in series with capacitor.