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RL Circuits - Technical MCQs

Q1:

As frequency increases

A both series and parallel RL impedance decrease

B series RL impedance decreases and parallel RL impedance increases

C series RL impedance increases and parallel RL impedance decreases

D both series and parallel RL impedance increase

ANS:D - both series and parallel RL impedance increase

w=0:1/10:2*π;
% RL Impedance Increases.

R=1; L=1;
Zs=R+j*w*L;
Zp=1./(1./R+1./j*w*L);
% normalized plots.
plot(w,abs(Zs)/max(abs(Zs)),w,abs(Zp)/max(abs(Zp))).