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Basic Electrical & Electronics Interview Questions & Answers
Electrical & Electronics Interview Questions & Answers
Basic Electrical & Electronics Engineering and Technology Interview Questions & Answers
- Why Transformer Rated In kVA, Not in KW?
- Why Motor rated in kW instead of kVA?
- Why AC (Air-condition) rating in Ton, not kW or kVA?
- Why Alternator rated in kVa, not in kW?
- Why Battery rated in Ah and not in VA?
- Why Power Plant Capacity Rated in MW and not in MVA?
- Why we can’t store AC in Batteries instead of DC?
- Why Earth Pin is Thicker and Longer in a 3-Pin Plug?
- What are the Colored Aerial Marker Balls on Power Lines For?
- Why Electric Power Transmission is Multiple of 11 i.e 11kV, 22kV, 66kV etc?
- Which Bulb Glows Brighter When Connected in Series and Parallel & Why?
- Is Lightning AC or DC ?
- Why Transformer Does not Work on DC Supply instead of AC?
- What Happens When an AC Line Touches a DC Line?
- Why Do Electronic Circuits Use DC Current instead of AC?
- How to Design, Calculate and Install a Solar Panel Energy System
- Three Phase Induction Motors (MCQs with Explanatory Answers)
- Batteries. (MCQs with Explanatory Answers)
- How to find The value of Burnt Resistor ( By three handy Methods )
- Capacitors (MCQs with Explanatory Answers)
- How to Calculate/Find the value of Ceramic / Non-Polarized Capacitors?
- Why Power is Zero (0), in Pure Inductive, Pure Capacitive or a circuit in which Current and Voltage are 90 Degree out of phase?
- Basic Concepts (MCQs With Explanatory Answers)
- DC Circuits (MCQs with Explanatory Answers.)
- Alternator / Generator ( MCQs with Explanatory Answers)
- Transformer (MCQs With Explanatory Answers)
- Single Phase AC Circuits. MCQs ( With Explanatory Answers)
- Why Current Decreases When Inductance or Inductive Reactance Increases?
- Why Current Increases When Capacitance Increases or Capacitive Reactance Decreases?
- In an Inductive Circuit, Why the Current Increases When Frequency Decreases?
- In a Capacitive Circuit, Why the Current Increases When Frequency Increases?
- Why Power Factor Decreases When Inductance or Inductive Reactance Increases?
- Why Power Factor Decreases When Capacitive Reactance Increases or Capacitance Decreases?
- Three Phase AC Circuits (MCQs With Explanatory Answers)
- Easy Charging Time and Charging Current Formula for Batteries. ( with Example of 120Ah Battery).
- How To remember the direction of PNP and NPN Transistor. One of the Easiest way.
- What is the Rule of Capacitor in AC and DC Circuit?
- Batteries Configuration. These Batteries have Connected in series or parallel? Clear Your Concept.
- A Bulb is Connected in this strange way with Ammeter as shown in fig. then what will be the current in Amp-Meter? (Clear Your Concept)
- Clear Your Concept. What will be the Current In ampere-meter which connected in Short path in This Basic Circuit.?
- Clear Your Concept. What will be the Current In ampere-meter in This Basic Circuit.?
- Ampere meter is connected in series with load. if there is also a short path, what will be the current in Amp-Meter?
- What is the normal or average life expectancy of a Transformer ?
- Why Flux in Primary and Secondary Winding of the Transformer is Same?
- According to Ohm’s Law, Current increases, when Voltage increases,(I=V/R), But Current decreases, when Voltage increases according to (P=VI). Explain?
- Why A.C needs more insulation than D.C at same voltage level?
- What is the objection to have lamps in a house-lighting circuit connected in series?
- How To Find/Calculate the Number of Fluorescent Lamps in a Sub Circuit?
- How to Determine the Number of Lamps in Final Sub Circuit?
- How much Watts Solar Panel We need for our Home Electrical appliances?
- Will a D.C Shunt Motor operate on an A.C Supply?
- Why the Reactance & Voltage under Fault Condition is Low and Current is High?
- Why Volume of the Conductor is Inversely Proportional to the Square of Voltage?
- AC Voltage at Home is 230V but its Equation is v = Vm Sin θ. Explain?
- What is the purpose of ground wires in over-Head Transmission lines?
- How To Calculate Your Electricity Bill. Easy and simple Explanation.
- A step up transformer which has 110/220 turns. Can we replace it with 10/20 turns? Turns ratio is same shall its rating be same? Give appropriate reason?
- Is it Possible to Operate a 50Hz Transformer on 5Hz or 500Hz Frequency?
- What will happen if the primary of a transformer is connected to D.C supply?
- Why We Need to Install a Starter with a Motor?
- Why an Inductor acts as a Short Circuit in DC Supply?
- What is motor starter?
- How to calculate the value of resistor for LED’s (with different types of LED’s circuits)
- How to Calculate/Find the Rating of Transformer in kVA (Single Phase and Three Phase)?
- How to Test a Capacitor by Digital & Analog Multimeter – 6 Methods
- What is the Q Factor in Electrical and Electronics Engineering
- How to Install a Solar Panel?
- Power Factor improvement Methods with Their advantages & Disadvantages
- Causes of Low power Factor
- Advantages of Power factor improvement and Correction:
- Working and Construction of Electric Phase or Line Tester
- How to find Diversity Factor in Electrical Wiring Installation
- Series, Parallel and Series-Parallel Configuration of Batteries
- How to Connect a Portable Generator to Home Supply System (Three Methods)
- Norton’s Theorem. Easy Step by Step Procedure with Example (Pictorial Views)
- Thevenin’s Theorem. Easy Step by Step Procedure with Example (Pictorial Views)
- How to determine the number of Nodes, Branches, Loops and Meshes in a Circuit?
- A Voltmeter, Ampere Meter and a Battery Cell are connected in Series. It is Observed that Ammeter Practically Shows No Deflection. Why?
- How to calculate or Find the value of SMD Resistors
- How to determine the suitable size of cable for Electrical Wiring Installation with Solved Examples
- How to Calculate the Suitable Capacitor Size in Farads & kVAR for Power factor Improvement.
- How to Convert Capacitor Farads into kVAR and Vice Versa (For Power factor improvement)
- Can We Operate a 60Hz Transformer on 50Hz Supply Source and Vice Versa?
- Which Transformer is More Efficient When Operates on 50Hz or 60Hz?
- Why Does A Capacitor Block DC But Pass AC?
Comparison & Differences
- Difference Between MCB, MCCB, ELCB & RCB, RCD or RCCB Circuit Breakers
- Difference Between Active and Reactive Power
- Difference between Analog and Digital Multimeter
- Difference Between Capacitor and Supercapacitor
- Difference Between a Battery and a Capacitor
- Difference between Circuit Breaker and Isolator / Disconnector
- Difference between Fuse and Circuit Breaker
- Difference between Contactor and Starter?
- Difference Between Relay and Circuit Breaker
- Difference between Power Transformers and Distribution Transformers?
- Difference between Star and Delta Connections – Comparison Of Y/Δ
- Difference between AC and DC Resistance & How to calculate it?
- Difference Between Electrical and Electronic Engineering?
- Difference between Active and passive Components ?
- Difference between Linear and Nonlinear Circuit?
- Difference between Real Ground and Virtual Ground?
- Difference between Unilateral and Bi-Lateral Circuits & Elements?
- Difference between a VOLTAMETER and a VOLTMETER?
- Differences between E.M.F and Voltage (P.d)?
- Difference Between Neutral, Ground and Earth?
- Difference Between Conductor, Semiconductor and Insulator
- Difference Between Conductor and Superconductor
- Difference Between a Transformer and an Induction Motor
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why not solar energy is very much common in india inspite of 305 days are clear sun shine.<br />
because of its high cost ..
There is night also…
hahahahaha
How current is varied when symmetrical fault occars????
what about other 60 days?
i want to participate in Electrical seminar<br />
At 400Hz Transformer rating is 400KVA, what will be the KVA rating at 50Hz?
Read this #basic about transformer<br />https://www.electricaltechnology.org/2012/03/can-we-operate-60hz-transformer-on-50hz.html
please give a tutorial on transformer winding and designing i.e turn ratio,current rating etc
If we took a cheap portable generator and remove the engine that drives it, attach it to bike pedals or turbine blades and run it on humanpower or steam, will it work just the same? Thank you.
I need some help to see if there is a solution that will involve not using a generator. Are there any batteries that would be capable of operating a table top food warmer with a 400 watt heat element and 100 watt bulb? If there are, what would be the max duration the warmer could reasonably function. The idea is to make a portable food cart bicycle. Most hot dog vendor bicycle carts use propane but will make food soggy. I just need a warming device for items like pizza or bread sticks, food you don’t want steamed. A generator would be too loud for a small bicycle food cart. Are there any batteries or innovative ideas that could work?
Thanks!
waleed khalafalla: need about high voltage..
What is the deference between voltage and current.tnks 4 ur respond
In simple word current is ur body and voltage is ur potential …..to push ur body potential is required
NICE Q&A’S
VERY USE FULL
wt is derationg factor
I want answer for all questions…
Its v.useful
I want to all answers the flowing question
as law in Dc Positive – Negative = Negative -A + Positive -E but i seen its diffrance why
Pls explain the following and how these are workingwith PLC
1.I/O module Card
2.I/O Bus
3.RS 485-FC
4.Adaptor Card
5.Ribbon Adaptor
Hi,
I bought a mobile phone from USA a Sprint samsung galaxy s2 d 710, a CDMA phone, it means they have not a sim slot (they have only an SD memory card slot.). I found in the market a device comprising the sim card slot and the SD memory card slot together.
My question is: Can I remove the old device which has only SD memory card slot and replace it with the new one comprising the two slots and put it on the motherboard ? Can this new device work properly whithout problem ?
Best Regards
I want download all this quastions.so please set the downloaded link
The phase voltage of a 3 phase source are V1(t)=100cos( t60o), V2(t)=100cos( t+60o), V3(t)= -100cos( t) this source is————–
a) Balanced and positive sequence b) unbalanced and positive sequence
c) Balanced and negative sequence d) unbalanced and negative sequence
i want an alarm which rung only one time after the electricity comes than automatically turn off any body can help me about it
Keep your fan light switches turned on while the electricity is gone. When electricity comes they’ll start operating. Best alarm ever.
Can I know the formula to calculate the genset capacity? For example, what are the genset capacity for 50amps PRIME power and 50amps STANDBY power ? Thank you.
I need answers to all these questions
i just need answer for all d question.
Just Click on the Question and you will be able to find the answer :) Thanks
very good resource for electrical engineering interview material
can i take the lcd screen from a vehicle dvd player and connect it to a head unit to operate as a video display?
so brillient knowlage of electric basic
hi,
thanks for help
Nice question and answer. Thank u sir
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What is meant by Modular inverter? please do reply
I have my interview this week, was searching for best questions and answers for electrical deign your article contents best questions it helped me a lot its a great share.
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