Download GTU BE/B.Tech 2019 Winter 1st And 2nd Sem Old 110005 Elements Of Electrical Engineering Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 1st And 2nd Sem Old 110005 Elements Of Electrical Engineering Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? I & II (OLD) EXAMINATION ? WINTER 2019
Subject Code: 110005 Date: 11/01/2020

Subject Name: Elements Of Electrical Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Define the following terms with respect to AC waveforms:
(1) Angular velocity (2) Form factor (3) Crest Factor (4) Instantaneous Value
(5) RMS Value (6) Phase angle (7) Frequency
07
(b) Compare electric circuit and magnetic circuit by their similarities and
dissimilarities.
07

Q.2 (a) Define the following terms with reference to Electrostatics & Electromagnetic:
(1) Electric potential (2) Electric flux density (3) Permittivity (4) Electric field
intensity (5) MMF (6) Magnetic flux density (7) Reluctance
07
(b) A 100 V, 100 W lamp is connected in series with 100 V, 60 W lamp across 200
V supply. Determine current drown and power consumed by each lamp.
07

Q.3 (a) Explain resonance in series R-L-C circuit with graphical representation and
resonance curve.
07
(b) Explain the method of transforming a star network into a delta network. 07

Q.4 (a) Explain two wattmeter method for power measurement in 3-phase delta
connected load.
07
(b) Derive an expression for the energy stored in an inductor of self inductance ?L?
henrys carrying the current of ?I? amperes.
07

Q.5 (a) A circuit consists of a pure inductor, a pure resistor and a capacitor connected
in series. When the circuit is supplied with 100 V, 50 Hz supply, the voltage
across inductor and resistor are 240 V and 90 V respectively. If the circuit takes
10 A leading current, calculate (i) value of inductance, resistance and
capacitance (ii) power factor of the circuit (iii) voltage across capacitor.
07
(b) Derive expressions of voltage and current for capacitor of C farads during
charging process.
07

Q.6 (a) Explain the construction of a cable with functions of its various parts with the
help of neat diagram.
07
(b) Explain charging and discharging of Lead acid battery. 07

Q.7 (a) What is importance of earthing ? Explain plate earthing with diagram. 07
(b) Explain the types of lighting schemes with suitable diagrams. 07

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