Determine the number and size of projectors required to floodlight a building front given specific parameters.
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.
What is an undesirable effect of current flowing through a conductor?
State Thevenin’s theorem and give a proof. Apply this theorem to calculate the current through a resistor.
How do you calculate the appropriate wire gauge for a given current load?
What is effect of polarization on a given volume of dielectric material? Answer : Polarization in a dielectric material refers to the alignment of the material's molecules or atoms when an external electric field is applied. The effect of polarization on a dielectric material ... in the material's ability to store electrical energy, as indicated by the dielectric constant....
Is flowing water a current?
List different types of faults occured on a power system. Draw necessary sketches (any four)
How to check if current is flowing?
When the same current is flowing in the same direction?
In which direction are electrons said to be flowing in conventional theory of current flow?
State Norton’s theorem and find the current using Norton’s theorem through a load.
Use Superposition theorem to find the voltage V in a given network.
How to calculate specific gravity without a hydrometer?
State the relationship between line voltage & phase voltage and line current & phase current in a 3-phase star connected system.
State the relationship between line voltage & phase voltage and line current & phase current in a 3-phase delta connected system.
How do you calculate the short-circuit current in a system? Answer : Calculating short-circuit current involves determining the amount of current that will flow when a short circuit occurs in an electrical system. This current is typically much higher than the normal ... the local regulations and standards (like IEC, IEEE) when doing these calculations in practice....
Select insulating materials for following parts: (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
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....
Classify various electric heating methods and explain them briefly.
What happens when voltage passes through a capacitor?
What is the new resistance of a given wire has resistance r if its radius is halved and length is unchanged?
What is the formula for current through a galvanometer?
What will happen if you increase current through a conductor ?
What is the electric displacement current through a surface is proportional to?
Which type of current always flows in one direction through a wire?
Can electric current pass through a sheet of Thermocol?
When no current flows through a conductor?
What is the necessary condition for superposition theorem to be applicable in any linear active and bilateral network?
How can energy be minimized through eddy current?
How do you find the current through RL?
Can DC current flow through an inductor?
Why can the current through an inductor not change instantaneously?
Can the current through an inductor change abruptly?
Why is the emf always even when no current is drawn through the battery?
Does current flow through the human body?
Can electric current flow through the human body?
What Cannot flow through electric current?
How to calculate the relative permittivity of a dielectric?
What is the effect of heating on a bimetallic strip?
How does self-heating affect high-power MOSFET operation?
What are the limitations of electric heating?
What are the limitations of ohmic heating? Answer : Ohmic heating, also known as Joule heating or resistive heating, has several limitations, including: 1. **Non-Uniform Heating** - If the electrical conductivity of the material is not uniform ... -conductivity materials, heating efficiency drops. Would you like more details on any of these points?...
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.
What is shoot-through in a bridge circuit and how is it prevented?
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.
How to calculate primary and secondary voltage?
How do you determine the best inverter topology for a given application?
Why is a capacitor necessary?
What will happen if DC supply is given on the primary of a transformer?
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