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RLC Circuits and Resonance - Engineering

Q1:

A 9 mH coil is in parallel with a 0.015 F capacitor across an 18 kHz ac source. The coil's internal resistance, RW, is 60 . The circuit impedance is

A 17,340 

B 1,734 

C 290 

D 1,018 

ANS:A - 17,340 

This question is solved by the admittance method and the process is lengthy and time-consuming.

In this question the capacitor is alone so the impedance of the second branch is not determined, so we can not find the impedance of the given question also voltage is not given, so the given question is the wrong statement.

If you can solve you assume the resistor value which will place in series with the capacitor than and then you can solve the problem otherwise it is not possible. Only inductor branch impedance is calculated.