Electromagnetic Induction

Electromagnetic induction is the process where a changing magnetic field induces an electromotive force (emf) in a circuit.

Faraday’s Laws Of Electromagnetic Induction

Faraday's Laws describe how electrical voltage is generated through changing magnetic fields and the principles behind it.

Lenz’s Law

Lenz's Law states that the induced current flows in a direction that opposes the change in magnetic flux that produced it.

Motional Emf

Motional EMF occurs when a conductor moves through a magnetic field, inducing an electromotive force (emf) proportional to factors including magnetic field strength, length of the conductor, and velocity.

Eddy Currents

Eddy currents are circulating currents generated within conductors exposed to changing magnetic fields, playing significant roles in various applications.

Self And Mutual Induction

Self and mutual induction are key concepts in electromagnetism that describe how coils can induce voltage in themselves and in other nearby coils due to changing currents.

Self-Induction (L)

Self-induction is the property of a coil that enables it to oppose changes in current through it by inducing an electromotive force (emf) in itself.

Mutual Induction (M)

Mutual induction occurs when a change in current in one coil induces an electromotive force (emf) in a nearby coil.

Alternating Current (Ac)

Alternating current (AC) is an electric current that periodically reverses direction, with significant implications in power distribution and electrical engineering.

Definition

Alternating current (AC) is an electric current that periodically reverses its direction.

Rms And Average Values

This section discusses the concepts of RMS (Root Mean Square) and average values in alternating current (AC) circuits, providing formulas and their significance.

Ac Circuits

This section discusses the principles of alternating current (AC) circuits, including their behavior in resistive, inductive, and capacitive configurations.

Pure Resistive Circuit (R)

In a pure resistive circuit, voltage and current are in phase, and energy is consumed as the electric current passes through the resistor.

Pure Inductive Circuit (L)

This section discusses the characteristics and behaviors of pure inductive circuits in AC systems.

Pure Capacitive Circuit (C)

A pure capacitive circuit features a current that leads the voltage, characterized by specific mathematical representations of the relationship between current and voltage.

Lcr Series Circuit

The LCR series circuit combines inductance, capacitance, and resistance, which affect the circuit's impedance and phase relationships.

Impedance (Z)

Impedance combines resistance and reactance in AC circuits, impacting current and voltage behaviors.

Current

This section describes the behavior and characteristics of current in AC circuits, including impedance, phase relationships, and resonance.

Phase Angle

Phase angle describes the relationship between the current and voltage in AC circuits and indicates whether the circuit is inductive or capacitive.

Resonance

Resonance occurs in an LCR circuit when the inductive reactance equals the capacitive reactance, resulting in maximum current and minimum impedance.

Power In Ac Circuits

This section focuses on the calculation of power in AC circuits, highlighting the significance of the power factor.

Transformers

Transformers utilize the principle of mutual induction to alter voltages in electrical circuits, playing a crucial role in power distribution.

Principle

This section discusses the principle of transformers based on mutual induction for voltage transformation.

Types

This section discusses step-up and step-down transformers, elaborating on their functions in voltage transformation.

Energy Losses In Transformers

The section discusses various energy losses in transformers, including copper losses, iron losses (hysteresis and eddy currents), and flux leakage.