JNTU
JNTU B.Tech II BASIC ELECTRICAL AND ELECTRONICS ENGINEERING Previous Question Paper (February - 2024 - R22)
Note: This question paper contains two parts A and B. i) Part- A for 10 marks, ii) Part - B for 50 marks. Part-A is a compulsory question. Part-B consists of ten questions (numbered from 2 to 11) carrying 10 marks each. From each unit, there are two questions and the student should answer one of them. Hence, the student should answer five questions from Part-B.
Part A
State the KCL.
Answer
Kirchhoff's Current Law (KCL) states that the algebraic sum of currents meeting at any junction or node in an electrical circuit is zero.
Define the term average value of sinusoidal current wave.
Answer
The average value of a sinusoidal current wave is defined as the arithmetic mean of all instantaneous values of the current over one complete half-cycle.
Write any types of wires used in electrical Installations.
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What is the purpose of earthing?
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Classify the DC generators.
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What are the different speed control methods of induction motors?
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What is meant by Half Wave Rectifies?
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Write any two applications of the Zener diode.
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Draw the symbol of PNP and NPN transistors.
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Mention the applications of Transistors.
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Part B
Obtain the resonant frequency of the R-L-C series circuit excited by a sinusoidal voltage source.
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Discuss the analysis of single-phase AC circuits using phasor diagrams, impedance and admittance concepts.
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What is the relationship between line and phase quantities in star-connected three-phase systems?
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Differentiate between independent and dependent sources and draw their circuit representation.
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Compare the Fuse with the Circuit breaker.
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Explain important characteristics of Batteries.
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Describe the types of cables with necessary diagrams.
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Discuss the Components of LT Switchgear and their Roles in Electrical Installations.
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Briefly describe the construction and principles of operation of a three-phase induction motor.
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What are the merits and demerits of induction motors?
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A 10-pole, 3-phase induction motor runs at a speed of 485 rpm at 50 Hz supply. Determine i) synchronous speed and ii) slip.
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With neat constructional details, explain the principle and operation of a synchronous generator.
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Derive the expression for the transition capacitance of a diode.
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Draw and explain the circuit diagram of full wave rectifier with an L-section filter.
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A Half Wave Rectifier circuit supplies 100 mA DC current to a 250 Ω load. Find the DC output voltage, PIV rating of the diode and RMS voltage for the transformer supplying the rectifier.
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Compare HWR and Bridge rectifier.
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Explain the construction of a Bipolar Junction Transistor (BJT) and the materials used in its fabrication.
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Draw and explain the working principle of CE configuration of a transistor.
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Differentiate between a BJT and FET.
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Explain the need for biasing in FET circuits.
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