EE 301 Electrical circuits and systems Summer 2023 Final Exam Grade [10M] Name: Question 1 a) Comp No: Explain the resonance phenomena and how it can be useful in telecommunication engineering b) For the series resonance circuit shown in figure 1, if the resonant frequency is 5000Hz, find i) I, VR, VL and V at resonance ii) The quality factor of the circuit, and the bandwidth www 000 R = 20 XL = 102 E = 10 V 20° X = 100;

Problem 3 – Resonance in AC networks [8] The parameters of a series RLC circuit are R = 1 kQ, L = 8 mH and C = 20 pF. The applied voltage is 20 V rms of variable frequency. Determine the following: (e) Voltage across the capacitor at resonance. (f) Lower and upper half power frequencies. (g) Bandwidth.

1. Derive the lower cut-off frequency for the basic RC high-pass circuit in Figure 1. R, Figure 1.

b. Choose the suitable choice foL ping of the following sentences 18 Maces 1. In order to tune a parallel resonant circuit to a lewer frequency the capacitor must a. Be increase. b. Be decrease. . BeZero. Remain the same 2. Ina very low frequency a series resonance behaves as Imost purely .......... circuit a Resistive. b Capacitive. . Inductive. d. Inductive and capacitive 3. Real part of the total impedance at resonance for complicated AC circuit is a. Positive Value. b. Zero Value. Negative Value. d. Complex value 4. For admittance locus the maximum obtained power factor is depend on a Maximum current b. Maximum voltage . Minimum power d. Minimum angle 5 Any non sinusoidal symmetrical waves are basically composite from fundamental wave plas .. of harmonics waves. aodd b. even . odd even d odd of even 6. If we append an inductance in series to an RL series circuit the time constant will be a Increases b. Decreases. Increases and Decreases. Increases or Decreases 7. The double energy…