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Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2017

Course Code: EE100
Course Name: BASICS OF ELECTRICAL ENGINEERING

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 4 marks Marks
1 Differentiate between Constant voltage and constant current sources. (4)
2 Compare electric and magnetic circuits. (4)
3 Derive the expression for RMS value of a sinusoidal waveform. (4)
4 Write the expression for three phase power in a delta connected system. (4)
5 What are the advantages of a hydroelectric power plant? (4)
6 Explain the working principle of a photovoltaic cell. (4)
7 Explain the working principle of a DC motor. (4)
8 Derive the emf equation of a transformer. (4)
9 Define and write the expression for slip of a 3 phase induction motor. (4)
10 Explain the working of a capacitor start single phase induction motor. (4)
PART B

MODULE (1-4)
Answer any four questions, each carries 10 marks

11 8) Solve the following circuit using mesh analysis and find டூ (5)

b) With a sample circuit, explain the step by step procedure of nodal analysis. (5)
12 a) State and explain Faraday’s laws of electromagnetic induction. (5)
b) With suitable example, explain statically and dynamically induced emf. (5)

13 a) Define and obtain the expression for power factor, active power, reactive power (5)
and apparent power of a series RLC circuit.
b) A 500 resistor in series with 120uF capacitor is connected 10 230V 50Hz supply. (5)
Find i) impedance 11) current iii) power factor iv) voltage across the resistor
v) voltage across the capacitor.
14 a) Explain the 2 wattmeter method of power measurement using the circuit (5)
arrangement.
b) A 3 phase 4 wire 400۷ system feeds three loads 10- j8Q each connected in star. (5)

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