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Explain how tip speed of rotor affects the performance of a wind turbine rotor.
List out causes for low power factor. With necessary diagram explain how synchronous condenser can improve the power factor along with its advantages and disadvantages.
Where it is used in power system?
Explain equivalent circuit of a solar cell. Also give performance characteristics of solar cell.
Define string efficiency. Derive equation of string efficiency for a three disc string.
Derive an approximate expression for sag in an overhead lines when supports are at unequal levels.
Two conductors of a single phase line, each of 1 cm diameter, are arranges in a vertical plane with one conductor mounted 1 m above the other. A second identical line is mounted at the same height as the first and spaced horizontally 0.25 m apart from it. The two upper and the two lower conductors are connected in parallel. Determine the inductance per km of the resulting double circuit line.
Derive an equation for line to neutral capacitance for a 3-phase overhead transmission line when the conductors are symmetrically placed.
With a neat diagram, show the various parts of a high voltage single core cable.
Show that maximum stress in a single-core cable is 2𝑉 𝑑𝑙𝑜𝑔𝑒𝐷/𝑑.
Draw schematic diagram of steam power station. Explain in brief function of
What is neutral grounding? What are the advantages of neutral grounding?
Give comparison of hydro power plant, nuclear power plant and gas turbine power plant.
Describe ungrounded or isolated neutral system. What are its disadvantages?
A single-phase a.c. distributor AB is fed from end A and has total impedance of (0.2 + j0.3) ohm. At the far end, the voltage VB = 240 V and the current is 100 A at a power factor of 0.8 lagging. At the mid-point M, a current of 100 A is tapped at a power factor of 0.6 lagging with reference to the voltage VM at the mid-point. Calculate the supply voltage VA and phase angle between VA and VB.
Non-reactive loads of 10 kW, 6 kW and 4 kW are connected between the neutral and red, yellow and blue phases respectively of a 3-phase, 4-wire 400/230 V supply. Find the current in each line and in the neutral wire.
BE Electrical
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Official Gujarat Technological University (GTU) examination paper for Power System- I (Summer 2026, B.E. · Electrical Engineering, Sem 4). 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.
3140914 Power System- I
Official GTU PDF · Summer 2026
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