gce 2022 intermediate level electrical and electronic circuits 2
gce 2022 intermediate level electrical and electronic circuits 2
SECTION A: ELECTRICAL CIRCUITS
1. (a) Define the following and give their units of measurement:
(i) Resistance
(ii) Electric Potential
(b) State and explain the Maximum power transfer theorem
(c) State the following laws and theorems
(i) KirchhofTs current and voltage laws
(ii) Thevenin’s Theorem
(iii) Norton’s Theorem
(iv) Ohm’s law
(d) Three resistors of 6Q each are connected in parallel to a 10V battery. Calculate the equivalent
resistance and the current through each resistor.
2. (a) In a series RLC circuit, when does resonance occur?
(b) Give the expression of the resonance frequency
(c) Give the expression of the quality factor
(d) Given the circuit of Figure 1 below
BOOmH 50pf
100Q
220V, 50HE
Figure 1
(i) Calculate the resonance frequency
(ii) Calculate the impedance of the circuit at resonance
(iii)Calculate the current flowing through the circuit at resonance
(iv) If the frequency is 50Hz, calculate the impedance
3. Consider the circuit of the figure 2;
±r E=72V IR8=50Q lR9=90Q R4=60n
*
Figure 2 15
(a) Calculate the equivalent circuit resistance RT of the circuit
(b) Calculate the power dissipated and deduce the supply current 1
(c) Calculate the various values indicated and fill the table below assuming that 1= 1 A
