Basic Electrical and Electronics Engineering (R-13)
Unit-124
- Basic Concepts-Introduction
- Basic Concepts-Introduction
- System of Units
- System of Units
- Charge and Current
- Charge and Current
- Voltage
- Voltage
- Power and Energy
- Power and Energy
- Circuit Elements
- Circuit Elements
- Basic Definition of A C Circuits
- Basic Definition of A C Circuits
- Problem based on Periodic Voltage Wave Form
- Problem based on Periodic Voltage Wave Form
- Advantages of Sine Wave
- Advantages of Sine Wave
- R -L Series Circuit
- R -L Series Circuit
- R - L Parnell circuits & R - L - C Parnell Circuits
- R - L Parnell circuits & R - L - C Parnell Circuits
- Active Power and Reactive Power and Apparent Power
- Active Power and Reactive Power and Apparent Power
Unit-246
- Basic Definitions
- Basic Definitions
- Types of Element
- Types of Element
- R-L-C Parameters
- R-L-C Parameters
- Voltage and Current
- Voltage and Current
- Independent and Dependent sources
- Independent and Dependent sources
- Source Transformations V-I relation for passive elements
- Source Transformations V-I relation for passive elements
- Ohm's Law
- Ohm's Law
- Kirchoff's laws
- Kirchoff's laws
- Problems based on Kirchhoff's Laws
- Problems based on Kirchhoff's Laws
- Network Reduction Techniques - Series parallel
- Network Reduction Techniques - Series parallel
- Problems based on Parallel Resistance Division Rule
- Problems based on Parallel Resistance Division Rule
- Network Reduction Techniques -Star to Delta Transformation
- Network Reduction Techniques -Star to Delta Transformation
- Nodal analysis
- Nodal analysis
- Problems based on Nodal Analysis
- Problems based on Nodal Analysis
- Form factor
- Form factor
- Types of Sources
- Types of Sources
- Problems based on Source Transformation
- Problems based on Source Transformation
- Steady state analysis of series,parallel
- Steady state analysis of series,parallel
- Series - parallel combinations of R,L,C with sinusoidal excitation
- Series - parallel combinations of R,L,C with sinusoidal excitation
- Concept of reactance,impedance,susceptance and admittance
- Concept of reactance,impedance,susceptance and admittance
- Phase and Phase difference
- Phase and Phase difference
- Concept of power factor
- Concept of power factor
- J notation,complex and polar forms of representation
- J notation,complex and polar forms of representation
Unit-326
- Concept of bandwidth and Q factor
- Concept of bandwidth and Q factor
- Locus diagram for RL,RC and RCL combinations for various parameters
- Locus diagram for RL,RC and RCL combinations for various parameters
- Combination of Dependent and Independent Sources
- Combination of Dependent and Independent Sources
- Norton's
- Norton's
- Maximum Power Transfer Theorem
- Maximum Power Transfer Theorem
- Maximum Power Theorem In AC Networks
- Maximum Power Theorem In AC Networks
- Superposition Theorem
- Superposition Theorem
- Problems based on Super Position Theorem
- Problems based on Super Position Theorem
- Reciprocity Theorem
- Reciprocity Theorem
- Thevenin's Theorem
- Thevenin's Theorem
- Tellegen's
- Tellegen's
- Millaman's
- Millaman's
- Compensation theorem for DC and Ac excitations
- Compensation theorem for DC and Ac excitations
Unit-430
- Energy band diagram
- Energy band diagram
- Volt-Ampere characteristics
- Volt-Ampere characteristics
- Temperature dependence
- Temperature dependence
- Ideal versus partical
- Ideal versus partical
- Statics and dynamic resistances
- Statics and dynamic resistances
- Equivalent circuit
- Equivalent circuit
- Load line analysis
- Load line analysis
- Diffusion and Transition Capacitances
- Diffusion and Transition Capacitances
- Half Wave rectifier
- Half Wave rectifier
- Ripple factor
- Ripple factor
- Full wave rectifier
- Full wave rectifier
- Bridge rectifier
- Bridge rectifier
- Harmonic components in rectifier circuits
- Harmonic components in rectifier circuits
- Filters - Inductor filters,Capacitor filters
- Filters - Inductor filters,Capacitor filters
- Filters - L section filters,pi section filters
- Filters - L section filters,pi section filters
Unit-528
- Amplifying action
- Amplifying action
- Common emitter,Common base and Common collector configuration
- Common emitter,Common base and Common collector configuration
- Transistor Biasing and Stabilization - Operating point
- Transistor Biasing and Stabilization - Operating point
- DC and AC load lines
- DC and AC load lines
- Biasing - Fixed bias
- Biasing - Fixed bias
- Emitter feedback bias
- Emitter feedback bias
- Collector to Emitter feedback bias
- Collector to Emitter feedback bias
- Voltage divider bias
- Voltage divider bias
- Bias stability,Stabilization against variation in VBE and beta
- Bias stability,Stabilization against variation in VBE and beta
- Bias compensation using diodes and transistors
- Bias compensation using diodes and transistors
- Hybrid model
- Hybrid model
- Determination of h parameters from transistor characteristics
- Determination of h parameters from transistor characteristics
- Analysis of CE,CB and CC configurations using h parameters
- Analysis of CE,CB and CC configurations using h parameters
- Comparison of CE,CB and CC configurations
- Comparison of CE,CB and CC configurations
Basic Concepts-Introduction
Basic Concepts-Introduction
- Electric circuit theory and Electromagnetic theory are the two fundamentals theories upon which all branches of Electrical Engineering are built.
- Many branches of Electrical Engineering such as power, Electric machines, control, electronics, communications and instrumentation are based on electric circuit theory.
- In Electrical engineering, we are often interested in communicating or transferring energy from one point to another.
- To do this requires an interconnection of electrical devices. Such an interconnection is referred to as an vv and each component of the circuit is known as Element.
- An Electric circuit is an interconnection of electrical elements.
Let us discuss about a Basic Simple Electric Circuit:
The above Electric circuit consists of three basic elements.
- A battery
- A lamp and
- A connecting wires.
Such a simple circuits can exist by itself . It has several applications such as flash light , and so forth.
A Complicated Real Circuit:
- The above diagram represents the schematic diagram for a radio receiver.
- Although it seems to be complicated, this circuit can be analyzed using the techniques .
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Q1 : 1. If 1 A current flows in a circuit, the number of electrons flowing through this circuit is
The charge of one electron is $$1.6 \times 10 ^{- 19}$$ coulomb. Again 1 A current means transferring of 1 coulomb charge per one second. $$1A=\frac{1}{1.6 \times10^{-19}}=0.625\times10^{19}$$
Q2 : 2. The resistivity of the conductor depends on
The resistivity is a property of material, defined as the resistance between two opposite faces of a cube of a material of unit volume. That is why resistivity is only the unique property of material and it does not depend upon the dimension of any piece of material.
Q3 : 3. The resistance of a conductor of diameter d and length l is R$$\Omega $$. If the diameter of the conductor is halved and its length is doubled, the resistance will be
As per law of resistance, the resistance of the conductor is inversely proportional to its cross-sectional area i.e. it is inversely proportional to the square of the diameter of cross-sectional area of the conductor. As per same law of resistance, the resistance of the conductor is directly proportional to the length of the conductor.
$$R=\frac{\rho L}{ \pi d^2/4},R_{new}=\frac{2\rho L}{\pi d^2/16},R_{new}=8RR$$
Q4 : 4. How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?
1 Ampere current means flowing of 1 Coulomb charge per second. That means 10 A current in 1 minute or 60 seconds implies $$10 \times 60=600$$ coulombs.
Q5 : 5. What is the unit of resistivity ?
Resistance $$R=\frac{\rho L}{A}\Rightarrow \rho =\frac{RA}{L}=\Rightarrow \frac{\Omega \times meter\times meter}{meter}=\Omega -m$$
Q6 : 6. Instantaneous power in inductor is proportional to the
The instantaneous voltage across the inductor is expressed as the product of inductance and rate of change of current through it. Power is expressed as the product of current and voltage. Hence instantaneous power in an inductor is proportional to the product of instantaneous current and rate of change of current through it.$$V_L=L \times \frac{di}{dt}=L \times (instantaneous current)$$
Q7 : 7. The voltage induced in an inductor is represented as
The instantaneous voltage across the inductor is expressed as the product of inductance and a rate of change of current through it as it doesn't allow any certain change of current through it. Voltage induced in an inductor is written as $$V_L=L \times \frac{di}{dt}$$
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