
Explore the difference between resistance and resistivity, showing how resistance scales with length and inversely with cross-sectional area, and introducing the formula R = ρL/A for a given material.
Clarify how emf and potential difference relate in circuits by linking E, V, I, and internal resistance, and show V equals E for an ideal battery when R is neglected.
ohm's law states that in a closed circuit, current is proportional to the applied voltage when temperature and other conditions are constant, with resistance as the constant.
Lecture Notes of Section – 1
(Ohm's Law & Inter-relationship Between V,I,R)
Discover the basics of AC and DC signals, clarify phase concepts with positive and negative phases, and see how sine, square, and triangular waveforms represent time-varying electrical quantities.
Explore time period and frequency relationships, cycles per second, and 50/60 Hz standards, plus waveform symmetry, rms, and peak concepts across sine, triangular, and square waves.
Define inductance as the property that opposes the rate of change of current via induced emf, using flux, coil turns, and the right-hand rule, including mutual coupling.
Capacitance stores charge between two plates separated by a dielectric, creating a voltage across the plates. Increasing plate area or reducing the gap increases capacitance and can improve power factor.
The lecture defines resistance and impedance, explains inductive and capacitive reactances, and presents Z = R + jX and Y = 1/Z, noting DC and AC behavior and basic units.
Explain why the emf equation includes a negative sign, since the induced emf opposes the rate of change of current. Apply this to inductive and mutual induction cases.
Lecture Notes of Section – 2
(Fundamentals of AC)
Explore kvl and kcl foundations, sign conventions for voltage drops across resistors with a source and three resistors, loop closure, and node current division.
Explore current division and voltage division rules, and see how current splits in parallel branches while voltages across them remain equal.
Explore mesh and node analysis to solve circuits; derive mesh equations with currents i1 and i2, then form a node voltage equation using V1 and resistances 5, 7, 6 ohms.
Lecture Notes of Section – 3
(Concept on KVL,KCL,Node,Mesh)
This lecture explains a DC machine's principle using Fleming's left-hand rule, showing how current in a magnetic field drives motor rotation and how residual flux induces emf in a generator.
Explain how a rotating magnetic field in the air gap drives induction motors, with three-phase and single-phase types and squirrel cage or wound-rotor rotors.
Explore how a single phase induction motor uses a main winding and an auxiliary winding with a 90-degree phase difference to create a rotating magnetic field.
Lecture Notes of Section – 4
(Fundamentals of Electrical Machine)
After completion of this course students will able to
Learn about Basic building blocks in Electrical Engineering.
Make their fundamentals clear which will help them to find their future Electrical Engineering subjects like Electric Machine, Power System, Power Electronics, Circuits & Network easy understanding.
Clear the fundamental differences between like resistance vs resistivity, emf vs potential difference etc.
Know the reason behind having negative sign in emf equation.
Know about a whole new approach on understanding Ohm's law.
Understand Foundation Concept in Kirchoff's Law .
Know Basic Concept on Node,Mesh & their significance in Circuit.
Learn the analytical procedure of various concept like mesh analysis,node analysis,star-delta transformation, current division rule, voltage division rule etc.
Know Role of Basic circuit elements like Resistance,Inductance, Capacitance and their use in Electrical Engineering.
Find A clear concept in Fundamentals in AC & DC also their difference.
Make a Crystal clear concept on one of the toughest concept in Electrical Engineering i.e. phasor diagram.
Realize a Basic understanding in Electrical Machines.
Know about operating functionalities of various types of motors like DC motors , induction motors( both single phase and three phase , synchronous motors.
Have a sound understanding about the basic difference between motor and generator, the basic fundamental physics on how they work, the laws involved in their operation and many more.
Know about a basic idea on how transformer operates in electrical system.
For conveinience of the students lecture notes of each section has been added at the the end of the section which will help the students to understand the concept easily & after completion of the course student can attempt a quiz to evalute their learning.