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RLC Circuits and Resonance - Technical MCQs

Q1:

The total circuit current is _____ in the given circuit.

A 1.52 mA

B 1.61 mA

C 2.21 mA

D 2.71 mA

ANS:C - 2.21 mA

xl=2πfl
=2*3.14*240*10^3*30*10^-3
=45216Ω

xc=1/2πfc
=1 ÷ 2 * 3.14 * 240 * 10^3 * 36 * 10^-3
=18430Ω
this is Parallel circuit
Vr=Vl=Vc
IR=V/R
=50/33*10^3
=0.00151515151A
IL=50/45216
=0.00110580A


IC=V/XC.
=50/18430,
=0.002712967987A,
I=√(IR^2+(IC-IL)^2),
=√(Ans^2 + (0.002712967987 - 0.00110580)^2),
=0.00220877184A,
=2.21mA.