Current Electricity

Current electricity involves the flow of electric charge through conductors and is essential for understanding electrical circuits.

Electric Current

This section defines electric current, explores its direction, and introduces the basic formula for calculating current.

Current In Conductors

This section covers the concept of current in conductors, particularly focusing on the behavior of free electrons when a potential difference is applied.

Ohm’s Law

Ohm's Law describes the relationship between voltage, current, and resistance in electrical circuits.

Resistivity And Conductivity

This section defines resistivity and conductivity, explaining their relationships and dependencies on material properties and temperature.

Temperature Dependence Of Resistance

Resistance in conductors increases with temperature, while it decreases in semiconductors.

Emf And Internal Resistance

This section discusses the concepts of electromotive force (EMF) and internal resistance in electric cells.

Electrical Energy And Power

Electrical energy is the work done by electric current and is related to power, which measures how quickly this work is done.

Combination Of Resistors

This section explains the series and parallel combinations of resistors, detailing how current and voltage behave in each configuration.

Cells In Series And Parallel

This section covers the configuration of cells in series and parallel, highlighting their effective emf and internal resistance.

Kirchhoff’s Rules

Kirchhoff's Rules consist of Kirchhoff’s Current Law (KCL) and Kirchhoff’s Voltage Law (KVL), which provide crucial techniques for analyzing electrical circuits.

Wheatstone Bridge

The Wheatstone Bridge is an electrical circuit used to measure unknown resistances by balancing two legs of a bridge circuit.

Meter Bridge

The Meter Bridge is an application of the Wheatstone bridge used to determine unknown resistances through a wire of uniform cross-section.

Potentiometer

The potentiometer is a device used to measure the electromotive force (emf) of electric cells and is based on the principle that the potential difference across a uniform wire is proportional to its length.