What is the difference between resistance grounding system and resistance earthing system?
When a fourth resistor is connected in series with three resistors, does the total resistance increase or decrease and by how much?
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, does the current increase or decrease?
What is electrical diversity factor in electrical installations?
How do you increase the winding resistance of a coil?
When the current through an inductor decreases, does the amount of energy stored in the electromagnetic field increase or decrease?
In a three-phase system, the voltages are separated by how many degrees?
In a three-phase system, when the loads are perfectly balanced, how much is the neutral current?
When the current through an inductor is cut in half, what happens to the amount of energy stored in the electromagnetic field?
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is?
If the cross-sectional area of a magnetic field increases, but the flux remains the same, does the flux density increase or decrease?
How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?
What is the function of a transformer?
What happens when the current through the coil of an electromagnet reverses?
A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will increase or decrease?
What is the unit for reluctance?
Why generator or any other system requires Neutral Grounding and not Phase grounding?
What happens if any one of the phases is grounded?
If 15kv is grounded directly, what will happen? Why should it not be grounded like that?
Why, for transformer protection, do we protect transformer from 3rd harmonics and 5th harmonics and what is the reason of generating these harmonics in electrical system?
What is meant by Active and reactive power?
Why in a three phase 440 circuit, in all the phases current is almost equal L1-35 A, L2-34 A ,L3-31 A, but in neutral when we check with clamp meter, it shows 25 A?
What is meant by derating factor?
How can we know the cable size for a given current?
Explain the working principle of servomotor.
Why are servomotor and induction motor in different shapes?
What is the difference between Induction motor and servo motor?
What are the advantages of speed control using thyristor?
How is the tube light circuit connected and how does it work?
Why is the link provided in neutral of an AC circuit and fuse in phase of an AC circuit?
What is Ferranti effect?
What is an exciter and how does it work?
What is the difference between a 4 point starter and a 3 point starter?
What are transformer losses?
What is "pu" in electrical engineering?
What is electric traction?
Describe the operation carried out in thermal power station. What is the difference between electronic regulator and ordinary rheostat regulator for fans?
