Q.1
14 Marks(a)
State Ohm’s law and Kirchhoff’s laws in context with DC circuits.
(b)
Compare resistive series and parallel circuit.
(c)
Find the current through 5 ohm resistance using the superposition theorem.
Gujarat Technological UniversitySummer 2025 examination
GTU BE01000051 Basic Electrical Engineering Summer 2025 Question Paper & PDF
B.E. · Common Engineering · Semesters 1 and 2 · Subject code BE01000051
- Total
- 70 marks
- To pass
- 23 marks (33%)
- Duration
- 2.5 Hours 10:30 AM – 1:00 PM
- Questions
- 5 with internal choice
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Q.2
14 Marks(a)
Define Q factor of series RLC circuit. What is the importance of it?
(b)
Draw impedance triangle, voltage triangle and power triangle for single phase R-L circuit.
(c)
Prove that current in purely capacitive circuit current leads its voltage by 90 and average consumption in pure capacitive circuit is 0.
OR
(c)
A single phase R-L-C circuit having resistance of 8 Ω, inductance of 80 mH and capacitance of 100 μF is connected across single phase ac 150 V , 50 Hz supply. Calculate the current, power factor and voltage drop across inductance and capacitance.
Q.3
14 Marks(a)
Explain magnetic hysteresis.
(b)
Explain working principle of single phase Transformer.
(c)
Explain with diagram construction of core type and shell type transformer.
OR
(a)
Derive the E.M.F. equation of a single phase transformer.
(b)
Explain the terms:- 1. Flux density 2. Reluctance 3. Permeability 4.
Electric field strength.
(c)
State comparison between practical transformer and ideal transformer.
Q.4
14 Marks(a)
Give comparison between Fuse and MCB.
(b)
Mention the types of single phase induction motor. Explain any one of them.
(c)
Give merit, demerit and application of induction motors.
OR
(a)
Explain the working principle of single phase induction motor.
(b)
Explain why single-phase induction motors are commonly used in household appliances like fans and refrigerators.
(c)
Explain generation of rotating manetic field in 1 – phase induction motor with diagram and equations.
Q.5
14 Marks(a)
Write short note on ELCB.
(b)
Write safety precaution for electrical appliances.
(c)
What is battery? Explain the construction and working of any battery.
OR
(a)
Give a list of safety device used for electrical appliances.
(b)
What is need of earthing ? Explain the different method of earthing.
(c)
Calculate the electricity bill amount for a month of April, if 4 bulbs of 40 W for 5 h, 4 tube lights of 60 W for 5 h, a TV of 100 W for 6 h, a washing machine of 400 W for 3 h, a water pump of 0.5 HP for 15 minutes are used per day. The cost per unit is Rs 3.50. Consider 1 HP = 746 watts.
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About this paper
Official Gujarat Technological University (GTU) examination paper for Basic Electrical Engineering (Summer 2025, B.E. · Common Engineering, Sem 1). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.