Electric Circuits and Networks

8.14 PROBLEMS

1. Find the equivalent impedance and admittance at ω = 100π rad/s for the circuits in Fig. 8.14-1.

    

   

    

   Fig. 8.14-1

2. A resistor of 200 Ω and an inductor of 0.5 H are in series. (i) Find the impedance of the combination at 60 Hz in rectangular form and polar form. (ii) Find a parallel RL circuit that has the same impedance at the same frequency. (iii) Find the impedance of the parallel equivalent in step (ii) for 50 Hz. Are the impedance values equal for the two circuits at 50 Hz?
3. A resistor of 200 Ω and a capacitor of 0.05 mF are in parallel. (i) Find the impedance of the combination at 60 Hz in rectangular form and polar form. (ii) ...