BEE (Basic Electrical Engineering) - Last Moment Tuitions

Introduction 1
- Lecture1.1
  
  Basic Electrical And Electronics Introduction 07 min
DC Circuits 16
- Lecture2.1
  
  BEE introduction (voltage , current ,resistance ) 21 min
- Lecture2.2
  
  How to add voltage ,current and resistance in series and parallel circuit 08 min
- Lecture2.3
  
  Nodal analysis with solved example 19 min
- Lecture2.4
  
  Nodal analysis of Supernode 08 min
- Lecture2.5
  
  Thevenin theorem with solved examples 12 min
- Lecture2.6
  
  Equivalent resistance problems with solved Examples 16 min
- Lecture2.7
  
  Nortons theorem with solved examples 08 min
- Lecture2.8
  
  Superposition Theorem with solved example 22 min
- Lecture2.9
  
  Source Transformation with solved example 17 min
- Lecture2.10
  
  Superposition Theorem with solved example (part 2 ) 22 min
- Lecture2.11
  
  Mesh analysis for SUPERMESH 11 min
- Lecture2.12
  
  Mesh analysis best trick 12 min
- Lecture2.13
  
  Star Delta Introduction 06 min
- Lecture2.14
  
  Delta to star conversion (Easy trick ) Vice versa with solved example 23 min
- Lecture2.15
  
  Numerical Of Star Delta 08 min
- Lecture2.16
  
  Maximum power transfer theorem 13 min
AC circuit 9
- Lecture3.1
  
  Alternating current full basics 11 min
- Lecture3.2
  
  AC Circuit 11 min
- Lecture3.3
  
  AC Terminology Sums 08 min
- Lecture3.4
  
  AC Circuit Numerical 11 min
- Lecture3.5
  
  Average Value Sums 10 min
- Lecture3.6
  
  RC Circuit 09 min
- Lecture3.7
  
  RLC Circuit Numerical
- Lecture3.8
  
  RMS value numerical 10 min
- Lecture3.9
  
  Peak, Average,RMS Values Of Current & Voltage 09 min
Transformer 6
- Lecture4.1
  
  Phasor Algebra 07 min
- Lecture4.2
  
  Open circuit tests and short circuit tests 07 min
- Lecture4.3
  
  Open circuit Tests and Short Circuit Tests Numerical Steps 10 min
- Lecture4.4
  
  Wattmeter reading 07 min
- Lecture4.5
  
  Open circuit Tests and Short Circuit Tests With percentage Of Efficiency And Regulation 10 min
- Lecture4.6
  
  Wattmeter Type Two 04 min
DC GENERATOR and DC MOTOR 5
- Lecture5.1
  
  DC Motor 08 min
- Lecture5.2
  
  EMF Equation of Generator 10 min
- Lecture5.3
  
  Types of DC Motor 11 min
- Lecture5.4
  
  Torque Equation of a DC motor 08 min
- Lecture5.5
  
  DC series Motor 12 min
HOW TO PASS 1
- Lecture6.1
  
  How To Pass BEEE (Basic Electrical Engineering) 08 min
BEE Viva Questions 1
- Lecture7.1
  
  DC Circuit Viva Question
Module 5 6
- Lecture8.1
  
  Diode 12 min
- Lecture8.2
  
  Forward and Reverse Bias 14 min
- Lecture8.3
  
  Zener Diode as a Voltage Regulator 12 min
- Lecture8.4
  
  Zener Diode 11 min
- Lecture8.5
  
  LED 12 min
- Lecture8.6
  
  Application of LED 10 min
Module 6 4
- Lecture9.1
  
  BJT 14 min
- Lecture9.2
  
  Application of BJT and FET 11 min
- Lecture9.3
  
  FET 12 min
- Lecture9.4
  
  Common Emitter 14 min
AC Analysis 10
- Lecture10.1
  
  A General Approach to solve an AC Circuit 08 min
- Lecture10.2
  
  Introduction to AC 24 min
- Lecture10.3
  
  Ways of Representing a Phasor 17 min
- Lecture10.4
  
  Elements_R_L_C 16 min
- Lecture10.5
  
  Series_RL_RC_Circuits 21 min
- Lecture10.6
  
  Series RLC Circuit 19 min
- Lecture10.7
  
  Parallel_RL_RC_RLC_Circuits 21 min
- Lecture10.8
  
  Detailed Numerical on Series RL Circuit 18 min
- Lecture10.9
  
  Detailed Numerical on Series RLC_Circuit 15 min
- Lecture10.10
  
  PYQ on Series circuits 22 min
Three phase 21
- Lecture11.1
  
  What is a 3-phase Electrical System 16 min
- Lecture11.2
  
  How 3-Phase POWER is Generated 18 min
- Lecture11.3
  
  Line and Phase Quantities 20 min
- Lecture11.4
  
  Single phase v_s Three Phase 20 min
- Lecture11.5
  
  Star Connection-1 14 min
- Lecture11.6
  
  Star Connection-2 12 min
- Lecture11.7
  
  Delta Connection 13 min
- Lecture11.8
  
  Power Calculation in 3_Phase_Circuits 14 min
- Lecture11.9
  
  Numerical on Star Configuration 18 min
- Lecture11.10
  
  Numerical on Delta Configuration 15 min
- Lecture11.11
  
  Star-Delta Transformation-1 15 min
- Lecture11.12
  
  Star-Delta Transformation-2 19 min
- Lecture11.13
  
  Star-Delta Transformation-3 17 min
- Lecture11.14
  
  Numerical on Star-Delta Transformation 13 min
- Lecture11.15
  
  Application of Star-Delta Transformation-1 14 min
- Lecture11.16
  
  Application of Star-Delta Transformation-2 13 min
- Lecture11.17
  
  Basics of Power Measurement 17 min
- Lecture11.18
  
  Two Wattmeter Method-1 16 min
- Lecture11.19
  
  Two Wattmeter Method-2 23 min
- Lecture11.20
  
  Numericals on 2-Wattmeter Method-1 13 min
- Lecture11.21
  
  Numericals on 2-Wattmeter Method-2 12 min

Basic Electrical Engineering Viva Questions

Module 1 : DC CIRCUIT

1. What is a direct current (DC) circuit?

● Direct current is a type of electricity that always moves in the same direction. It's

like a line of people holding hands and walking forward in a straight line,like a

one-way street. They never change direction, just like the electricity in a direct

current circuit never changes direction. This type of electricity is produced by

batteries and used in many electronic devices like cell phones, flashlights, and

some trains.

● The electricity flows out of the negative end of the battery, through the light bulb

or other device, and then back into the positive end of the battery. This flow of

electricity in one direction is called direct current.

2. What is a switch and resistor ?

Switch :

Definition 1 : A switch is a button that turns things on and off, like a light switch in

your room.

Definition 2 : A switch is a control mechanism used to connect and disconnect

electrical circuits.

Resistor :

Definition 1 : A resistor is a part that makes electricity flow slower, like a traffic cop

that makes cars slow down.

Definition 2 : A resistor is an electrical device used to limit the flow of current in an

electrical circuit.

So, switches and resistors are like little helpers in a circuit, making sure everything

works safely and properly.

3. Can you explain Ohm's Law?

● Ohm's law is a scientific rule that tells us how electricity behaves. It says that the

amount of electricity flowing through a material (like a wire) is related to the

voltage (or pressure) of the electricity and the resistance of the material.

● Let's say you have a light bulb. The light bulb needs electricity to work, and it gets

electricity from the wires connected to it. The amount of electricity that flows

through the wires and into the light bulb is like the water flowing through a pipe.

● Now, let's say you want to make the light brighter. You can do this by either

increasing the water pressure in the pipe (which is like increasing the voltage in the

wires), or by making the pipe narrower (which is like reducing the resistance in the

wires).

● If you increase the voltage, more electricity will flow into the light bulb, and the

light will get brighter. But if you reduce the resistance, more electricity will flow,

and the light will also get brighter.

● So, just like with the pipe and the water, the amount of electricity flowing into the

light bulb (measured in amps) is related to the voltage (measured in volts) and the

resistance (measured in ohms) of the wires. And this relationship is what we call

Ohm's law.

4. How does Ohm's law is applied in DC circuits?

● Ohm's law is like a recipe for electricity in a DC circuit. It tells you how

much electricity will flow in the circuit if you know two things: the voltage

(like the pressure) and the resistance (like the size of the pipe).

● Imagine you have a battery, wires, and a light bulb. The battery is like a

pump that pushes the electricity through the wires. The wires are like pipes,

and the light bulb is like a faucet that lets the electricity out. The light bulb

also gets hot and uses up some of the electricity, just like a water tap uses

up some of the water.

● Now, if you want the light to shine brighter, you can either increase the

voltage from the battery or decrease the resistance in the wires. But if you

increase the voltage too much, or decrease the resistance too much, the

light bulb could burn out. So you have to be careful and use Ohm's law to

find the right balance.

● So, in a DC circuit, Ohm's law helps you understand how the different parts

of the circuit are connected and how they work together.

5. What are capacitors and inductors in a DC circuit?

● A capacitor is like a bucket for electricity. When you pour water into a bucket, it

fills up and holds the water until you need it. A capacitor does the same thing with

electricity - it stores it and releases it when needed.

● An inductor is a device that stores electrical energy in a magnetic field. It looks

like a coil of wire and when you pass electricity through it, a magnetic field is

created and stores the electric energy. It's kind of like an invisible battery that

stores electricity and can be used later.

6. What is Kirchhoff’s law?

Kirchhoff's laws are like rules for understanding how electricity flows in a circuit.

They help us predict and control the flow of electricity in a circuit.

There are two laws of Kirchhoff:

The first law, known as Kirchhoff's Current Law ( KCL )

● KCL states that the “total current entering a junction or node is exactly equal to the

current leaving the node.” It's like a river where the water flowing inside a tunnel

must equal the water coming out from that tunnel. The same goes for electricity.

● In other words, the algebraic sum of all the currents entering the node must be

equal to the algebraic sum of all the currents leaving a node.

In the first Diagram you can see there are six currents i₁ , i₂ , i₃ , i₄ , i_{5 ,} i₆

respectively. Where i₁ , i₂ , i₃ are incoming currents whereas i₄ , i₅ , i₆ are the

currents going out. The center point (node) is called a junction.

● Junction is a point where two or more currents meet. For example, as we all know

that a railway station where express trains from various cities come is known as a

junction because that is the place where every train comes and stops or meets.

Similarly in terms of electricity the point at which two or more electric currents

meet is said to be a junction.

The second law is known as Kirchhoff's Voltage Law ( KVL )

Kirchhoff’s voltage law states that the voltage around a loop equals the sum of every

voltage drop in the same loop for any closed network and equals zero.

7. Discuss the concept of electrical potential difference ( Voltage ) .

● Electrical potential difference is like a water pump. Imagine you have a

pool of water at the bottom of a hill, and you want to pump the water to the

top of the hill. The water pump will push the water up the hill and create a

difference in height between the water at the bottom and the water at the

top. This difference in height is like the electrical potential difference.

● In electricity, we have something called voltage, which is the same thing as

electrical potential difference. Voltage is the difference in electrical energy

between two points in a circuit, just like the difference in height between

the bottom and top of the hill with the water pump. When you have a high

voltage, it means that there is a lot of electrical energy, and it can push

electrical charges (like electrons) around a circuit.

The above diagram clearly explains the concept of electric potential difference. i.e

Voltage

8. How does electrical potential difference (Voltage) relate to the flow of current in a

circuit?

● Assume a river with water flowing from one end to the other. The water is

like electricity, and the speed of the water flow is like the flow of electric

current.

● Now, imagine there is a dam in the middle of the river. The water behind

the dam is like the electrical energy stored in a battery. The dam is like a

voltage source, and it pushes the water down the river. The higher the dam,

the stronger the push and the faster the water will flow.

● In the same way, voltage pushes the electrons in a circuit, and the higher

the voltage, the faster the electrons will flow, which is what we call electric

current. So, you can think of voltage as the "push" that makes the electrons

flow in a circuit, and current as the flow of electrons that powers the

devices in the circuit.

9. Explain Thevenin's theorem

● The Thevenin's Theorem states that any linear network with voltage

sources, current sources, and resistors connected together can be reduced to

an equivalent circuit with just a single voltage source and a single resistor.

This equivalent circuit is known as a Thevenin equivalent circuit.

Let's simplify it even more with an example.

● Imagine you have a bunch of batteries and light bulbs connected together

to make a circuit. Thevenin's theorem says that we can think of the whole

circuit as just one battery and one light bulb, which represents the whole

circuit in a simple way. This makes it easier for us to understand and work

with the circuit.

● Think of it like cooking a big feast for many people. You can cook each

dish separately and then combine them together, or you can mix everything

together and cook the whole thing at once. Thevenin's theorem is like the

second option, where we simplify the whole thing so it's easier to

understand and work with.

● By this we get to know that Thevenin's theorem is a way to simplify a

complex electrical circuit so it's easier to understand and work with.

10. What is Norton's theorem?

● It states that any linear electrical network containing only voltage sources,

current sources, and resistors can be replaced by a single current source in

parallel with a single resistor. The value of the resistor is equal to the sum

of the resistances in the original network, and the value of the current

source is equal to the sum of the currents in the original network.

This theorem is useful in circuit analysis because it can be used to reduce a complex

circuit into a simple equivalent circuit.

Let's Make it More Simple :

● Think of an electrical circuit as a garden pipe. Just like water flows through

a pipe, electricity flows through a circuit. But sometimes, the pipe might

have lots of twists and turns, which makes it harder for the water to flow.

● Norton's theorem says that even if a circuit is really complicated, it can be

replaced by a simple circuit that acts just like it. This simple circuit is like a

single pipe that's easy to understand. Instead of water, this pipe has

electricity flowing through it, and we can measure how much electricity is

flowing just like we can measure how much water is flowing in the original

pipe.

● So, Norton's theorem helps us understand complicated circuits by making

them simple, which makes it easier for us to study how electricity flows

and how we can control it.

11. Discuss some common applications of DC circuits in batteries and rectifiers?

Direct Current (DC) circuits are widely used in many applications involving

batteries and rectifiers. Here are a few common applications of DC circuits in these

areas:

● Batteries: DC circuits are used in many types of batteries, such as

lead-acid batteries, nickel-cadmium (NiCad) batteries, and lithium-ion

batteries. These batteries store electrical energy and can supply it to

devices that need it, such as flashlights, cell phones, laptops, and electric

vehicles.

●

Rectifiers: Rectifiers are devices that convert Alternating Current (AC) to

Direct Current (DC). They are used in many applications, such as power

supplies for electronic devices, charging batteries, and welding. One

common application of rectifiers is in power supplies for electronic

devices, where the AC power from the wall socket is converted to DC to

power the device.

o Rectifiers are like magic boxes that change one type of electricity

into another. Some things, like cell phones and computers, need a

special type of electricity called DC to work. Rectifiers take regular

electricity (AC) and change it into DC, so these things can use it.

●

Solar Cells: Solar cells are devices that convert sunlight into electrical

energy. They are connected in series to form a solar panel, which is then

used to charge batteries or to provide power to devices directly. Solar cells

use DC circuits to store and use the electrical energy they produce.

●

Electric Motors: DC motors are widely used in many applications, such as

electric vehicles, toys, and industrial applications. The DC voltage from a

battery or a rectifier is used to control the speed and direction of the motor.

These are just a few examples of the many applications of DC circuits in

batteries and rectifiers.

12. Maximum Power Transfer Theorem.

● The Maximum Power Transfer Theorem is a principle in electrical engineering that

states that to transfer the maximum amount of power from a power source (such as

a battery or generator) to a load (such as a resistor or motor), the load resistance

should be equal to the internal resistance / Thevenin's equivalent Resistance of the

source.

● The Maximum Power Transfer Theorem is a useful tool for electrical engineers in

the design and analysis of electrical circuits. By understanding the theorem and

applying it in the design process, engineers can optimize the performance of

electrical systems and ensure that the maximum amount of power is delivered to

the load.

Let us go with an example,

● Imagine you have a water pipe and you're trying to fill a bucket with water as fast

as you can. If the hole in the bottom of the bucket is too small, the water will take a

long time to fill the bucket. But if the hole is too big, the water will splash out and

you won't be able to fill the bucket.

● The same thing is true for electricity. If the electrical circuit that you're trying to

power has too much resistance, not enough electricity will flow through to do what

you want. And if the circuit has too little resistance, some of the electricity will be

wasted and not used to power the circuit.

● The Maximum Power Transfer Theorem says that the best way to make sure the

most electricity gets to where you want it to go is to have the right amount of

resistance in the circuit. If the resistance of the circuit is just right, the most

electricity will flow through and the circuit will work at its best.

● So, this theorem helps us make sure that the electricity we're using is not wasted

and that we're getting the most power to where we want it to go.

DC Circuit Viva Question

Prev How To Pass BEEE (Basic Electrical Engineering)

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Introduction 1

DC Circuits 16

AC circuit 9

Transformer 6

DC GENERATOR and DC MOTOR 5

HOW TO PASS 1

BEE Viva Questions 1

Module 5 6

Module 6 4

AC Analysis 10

Three phase 21

DC Circuit Viva Question

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