Derive the mathematical expressions for designing circular and rectangular heating elements. Answer : To design heating elements, whether circular or rectangular, we need to derive mathematical expressions related to heat generation and power dissipation in the element. The key principles ... electrical properties to meet the desired power dissipation while considering safety and efficiency factors....
Write the expressions for delta connected resistors in terms of star connected resistors.
Write the expressions for star connected resistors in terms of delta connected resistors.
Explain with a neat circuit diagram only the Scott connection scheme for the conversion of three-phase supply to two-phase supply. Name one application of the same.
Write any two differences between single-phase and three-phase transformers.
Explain with block diagram the construction and working principle of three phases electronic energy meter?
How does a quadrature phase detector compare signal phases in a PLL?
How does a quadrature phase detector compare signal phases?
Write the expression for the instantaneous values of EMFs in a 3-phase circuit. Answer : In a 3-phase circuit, the instantaneous values of the Electromotive Forces (EMFs) in the three phases can be expressed as sinusoidal functions, assuming a balanced system where the phases are 120° ... , these expressions show how the voltages in each phase are related in both magnitude and phase....
How do you wire a three-phase motor for industrial applications?
List the conditions for parallel operation of three-phase transformers.
Draw neat diagram of star-delta starter for three phase induction motor.
Give some methods available for measuring three-phase power.
A plant consists of two 10 MVA generators of reactance 18% each and two 5 MVA generators of 12% each. All are connected to bus bar to supply a load through three step up transformers of 8 MVA each having reactance of 8%. Determine fault MVA on HV side of any one transformer.
Write Laplace's equation in three dimensional electrostatic problem.
Explain with the help of a neat diagram the working of a 3-phase autotransformer. Write any two applications.
Write down the EMF equation of a single-phase transformer.
Write the expression of phase angle in terms of the reading of the 2 wattmeters in the two wattmeter method.
A 3 phase line of 4 km length delivers 4000 kW at a p.f of 0.8 lagging to a load the resistance and reactance per km of each conductor are 0.2 Ω and 0.5 Ω respectively if the voltage at the supply end is maintained at 11 kV. Calculate the received end voltage and efficiency of line.
Derive the torque equation of 3 φ I.M. under running condition.k) Explain production of R.M.F. in 3-phase I.M. when 3 φ supply is fed to it. Draw its phasor diagram.
What is the mathematical expression for Helmholtz free energy?
What is the mathematical expression for free energy?
What is the mathematical expression for drift current?
What are the benefits of a three-phase UPS? Answer : A **three-phase UPS** (Uninterruptible Power Supply) offers several advantages over single-phase UPS systems, especially for larger or more complex electrical setups. Here are the key ... for larger setups, making it the preferred choice for applications with significant power requirements....
What are the benefits of using a three-phase inverter?
What is the purpose of a phase rotation relay in three-phase electrical systems?
Give the specification of a three-phase transformer as per IS 1180 (Part 1) 1989 (any four).
Describe the method of converting a three-phase to a two-phase transformer by neat diagram. State any two applications.
Give the specification of a three-phase transformer as per IS : 1180 (Part I).
Explain the principle of working of a three-phase induction motor.
A three-phase transformer having a line voltage ratio of 0.4 kV/11kV is connected Star/Delta and protective transformers on the 0.4 kV side have a current ratio of 500/5. Calculate the ratio of ... on the 11 kV side. Draw a neat circuit diagram and indicate the given values at appropriate places.
A 220V/22kV three-phase transformer is connected in star/delta. The protective transformers on the 220V side have a current ratio of 400/5. Calculate the CT ratio on the 22kV side.
What is a three-phase distribution system?
What is a three-phase system?
What is a three-phase UPS system?
How does a three-phase inverter work?
How does a three-pole MCB function in a three-phase system?
How does a three-phase induction motor work?
How does a three-phase transformer work?
How does a three-phase electrical system work?
What is the difference between a delta and wye connection in three-phase systems?
How do you measure power in a three-phase system?
What is the difference between a single-phase and a three-phase induction motor?
How does a three-phase inverter generate a pure sine wave output?
How does a three-phase rectifier convert AC to DC?
How does a three-phase inverter generate balanced AC output?
How does a three-phase inverter generate AC power?
What are the advantages of three-phase systems?
What is the significance of three-phase power transmission?
What is the significance of phase shift in three-phase transformers?
29.4k questions
1.3k answers
7.4k users