Basic Concepts of Electrical Engineering — Major (End Semester) 2023 question paper
MMMUT Information Technology previous year question paper for Basic Concepts of Electrical Engineering (BEE-105), semester 1, Major (End Semester) 2023. All 22 questions are listed below, each with a written answer on Nexsus.
Paper details
Subject: Basic Concepts of Electrical Engineering (BEE-105)
Branch: Information Technology
Semester: 1
Exam: Major (End Semester) 2023
Questions: 22
Questions asked in Basic Concepts of Electrical Engineering Major (End Semester) 2023
Q1(a). Explain active and passive element with example. [2 marks]
Q1(b). What is the difference between ideal voltage source and practical voltage source. [2 marks]
Q1(c). State and explain Thevenin's theorem. Also enlist its disadvantages. [2 marks]
Q1(d). Explain quality factor of a series resonant circuit. [2 marks]
Q1(e). Explain active, reactive, and apparent power for a three-phase AC system. [2 marks]
Q1(f). Draw and explain hysteresis loop. What is its significance. [2 marks]
Q1(g). Write and explain the condition for maximum power efficiency. [2 marks]
Q2(a). Write and solve the node voltage equation for the circuit shown in Fig. 2(a). Find the current through 522 resistance. [5 marks]
Q2(b). The potential of point A is -30 Volts, using KVL, find (a) value of V* (b) power dissipated by 5 R, network shown in Fig. 2(b). [5 marks]
Q2(c). Drive the expression for star-to-delta and delta-to-star network transformation. [5 marks]
Q3(a). Find the current across 12 S2 resistor for a given network shown in Fig. 3(a) by using Thevenin's theorem.
Q3(b). For the circuit shown in Fig.3(b), find the current through R = R = 12 resistor (la-a branch) using Norton's theorem and calculate the voltage across the current source (Vag ).
Q3(c). State and proof of maximum power transfer theorem. And write steps for solving problems on maximum power transfer theorems.
Q4(a). The AC supply at a house is 230V, 50Hz, find the following: i) maximum value ii) rms value iii) average value iv) for factor and peak factor
Q4(b). Explain series resonance. Why is series resonance called the voltage resonance? Show the graphical representation of series resonance.
Q4(c). The circuit components of a parallel circuit shown in Fig. 4(c) are R = 80 kg, L = 7mH, and C= 60 pF. Find (i) the resonant frequency, (ii) the quality factor, and (iii) the bandwidth.
Q5(a). Derive the e.m.f equation of a single-phase transformer. A single-phase transformer has 400 primary and 1000 secondary turns. The net cross-sectional area of the core is 60 cm?. If the primary winding is connected to a 50Hz supply at 520 V. Calculate (i) the peak value of flux density in the core (ii) Voltage induced in the secondary winding.
Q5(b). Explain the analogy between electric and magnetic circuits. Define Reluctance, Permeability, and Magneto-Motive Force (MMF).
Q5(c). A 25 KVA, 4000/200, 50 Hz transformer has R1 = 3.45 Ω, R2 = 0.009 Ω, X1 = 5.2 Ω and X2 = 0.051 Ω, calculate equivalent resistance and equivalent reactance referred to primary and secondary winding. Also calculate net power loss due to winding resistance.