Using Kirchhoff’s Voltage Law (KVL), calculate the current flowing through a 2 Ω resistor in a simple series circuit containing a 12 Vbattery, a 2 Ω resistor, and a 4 Ω resistor. Page 1 of
[3 marks]For the given circuit, apply Thevenin’s Theorem to determine the current flowing through a 6 Ω load resistor connected across two terminals. (Assume: a 24 Vsource with 4 Ω and 8 Ω resistors in series, load of 6 Ω connected across the 8 Ω resistor terminals.)
[4 marks]A DC circuit consists of three resistors: R1 = 10 Ω, R2 = 20 Ω, and R3 = 30 Ω, connected in a star configuration. Convert this star network into its equivalent delta network, and calculate the resistance values of each branch of the delta.
[7 marks]Compare the behavior of a pure resistor, a pure inductor, and a pure capacitor when each is connected to a single-phase AC supply.
[3 marks]Analyze and explain why the power factor in an inductive load is always lagging, while in a capacitive load it is leading.
[4 marks]Athree-phase system can be connected in either star (Y) or delta (Δ) configuration. Analyze and discuss the differences between these two connections in terms of: Line and phase voltages Line and phase currents Typical applications in electrical systems
[7 marks]Analyze the conditions for series resonance in a single-phase RLC circuit. Discuss how: Voltage and current behave at resonance, Power factor changes at resonance, and Two practical applications of resonance in electrical systems.
[7 marks]Explain the difference between a magnetic circuit and an electric circuit with one simple example each.
[3 marks]Describe the working principle of a single-phase transformer. Why is it called a “static” electrical machine? Page 2 of
[3 marks]Explain the construction and working of a single-phase induction motor. Also, list at least three common household applications where this motor is used.
[7 marks]What is hysteresis loss in magnetic materials? Explain why it occurs in transformers.
[3 marks]Describe the term rotating magnetic field. How is it produced in an induction motor?
[4 marks]Explain the working principle of a brushless DC motor (BLDC). Also, mention two advantages of BLDC motors over traditional DC motors.
[7 marks]Explain the difference between MCB (Miniature Circuit Breaker) and ELCB (Earth Leakage Circuit Breaker).
[3 marks]Describe the importance of earthing in domestic wiring systems. Mention two common types of earthing.
[4 marks]Explain the general procedure of preparing an electricity bill for a household. Also, discuss how energy consumption of appliances is calculated in kilowatt-hours (kWh).
[7 marks]What are the different types of lamps used in domestic and commercial wiring? Briefly explain any two.
[3 marks]Explain the function of a wattmeter. How is it different from an ammeter and a voltmeter in electrical measurements?
[4 marks]Explain the safety precautions that should be taken while handling household electrical appliances. Support your answer with at least three examples.
[7 marks]State the working principle of a voltmeter.
[3 marks]State the characteristics of a battery.
[4 marks]Write short note on Switch Fuse Unit (SFU)
[7 marks]State any three applications of brushless DC (BLDC) motors in daily life.
[3 marks]State different types of batteries and mention one example of each.
[4 marks]Write short note on Earth Leakage Circuit Breaker (ELCB) Page 3 of
[3 marks]