Top 100 Electrical Engineering Questions for MBA Interviews
In what units is Resistance measured?
The number of microamperes in 2 milliamperes is how much?
An electric heater draws 3.5 A from a 110 V source. What is the resistance of the heating element?
If 750 μA is flowing through 11k Ω resistance, what is the voltage drop across the resistor?
A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, and silver?
Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8k Ωof resistance?
When converting 1,600 kilohms to megaohms, the result is?
When there is 12 mA of current through a 1.2 k Ω resistor, the voltage across the resistor is how much?
What is inrush current?
In a Tap changing transformer, where is the tap connected? Is it connected in the primary side or the secondary side?
Why are transformer ratings in KVA?
What is the difference between fuse and breaker?
What is the difference between delta-delta and delta-star transformer?
Capacitor is load free component but why ampere meter shows current when capacitor bank breaker closes?
Why is electricity in India in the multiples of 11 like 11kv, 22kv, 33kv?
Why do we use AC and not DC system in India?
Which type of motor is used in trains, what is the rating of supply used? Explain the working principal.
Are battery banks connected in series or in parallel and why?
Differentiate between megger test equipment and contact resistance meter test instruments.
When do we connect the large capacitor back in series?
What is electrical diversity factor in electrical installations?
Why is field rheostat kept in minimum position while armature rheostat is kept in maximum position?
Why does the humming sound occur in computers in HT transmission line?
What is rated speed?
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?
What will happen when power factor is leading to distribution of power?
What is the one main difference between UPS & inverter and electrical engineering & electronics engineering?
What is ACSR cable and where do we use it?
What is the principle of motor?
What is meant by armature reaction?
Why do human bodies feel Electric shock? In an Electric train during running, we don't feel any shock. Why?
Which motor has high Starting Torque and Starting current DC motor, Induction motor or Synchronous motor?
What is a vacuum circuit breaker?
Why when birds sit on transmission lines or high tension wires, they don't get electrocuted?
What is the significance of vector grouping in Power Transformers?
What is the Polarization Index value? (pi value)and simple definition of Polarization Index?
What is the difference between neutral circuit and core balance circuit protection?
What is electrical engineering?
What are the various kinds of cables used in transmission?
Explain the application of storage batteries.
What is slip in an induction motor?
Why is back emf used for a DC motor? Highlight its significance.
Why is star delta starter preferred over induction motor?
State the difference between a Generator and an Alternator.
How can you relate Power engineering with Electrical engineering?
What is the difference between synchronous and asynchronous generator?
What is automatic voltage regulator (AVR)?
State Thevenin's theorem.
State Norton's theorem.
State Maximum Power Transfer theorem.
Explain the working principal of the circuit breaker.
What is the function of anti-pumping in circuit breaker?
What is the difference between an isolator and a circuit breaker?
What is meant by regenerative braking?
Why can series motor not be started on no-load?
What is the difference between MCB and MCCB? Where are they used?
Where should the lighting arrestor be placed in distribution lines?
Define IMDT relay.
Describe the different topologies in networking. Which is the most efficient?
Tell me the definition of an analog signal and a digital signal.
In what direction do a ceiling fan and a table fan rotate? And why this difference in the directions?
How does a transformer work?
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