Electric current: Ohm’s law, resistivity

Introduction  An electric circuit is an uninterrupted, conductive, complete, and closed path through which electrons flow from a source of electric power or source of energy through a device and returns to its source to complete the flow.  On connecting the electric circuit to a battery, electrons flow from the battery’s negative terminal through one […]

Conductors are materials that allow the flow of electric charge, also known as electric current. The most common conductors are made of metal. Such materials allow current to flow due to the presence of free electrons or ions that begin to move when voltage is applied. The electrical resistance of the conductor is comparatively low

An electrical conductor is an object or type of material that facilitates the movement of charge (electric current) in one or more directions in the fields of physics and electrical engineering. Metals are commonly used as electrical conductors in a variety of applications. Electric current is formed by the flow of negatively charged electrons, positively

Potential difference (PD) and electromotive force (EMF) are energy types measured in volts, but the two parameters are very different.  We notice two potential differences between the battery terminals when working with cells and batteries in real life. These potential differences are caused by the battery’s non-ideal nature, which increases the resistance inside the battery.

Inductors and capacitors are the only devices that provide resistance to AC, which is termed reactance. In contrast, impedance is the sum of an inductor’s resistance and reactance. The reactance is just the obstacle to the AC flow of current supplied by simply two elements – the inductor and the capacitor.  There will be reactance

The German physicist Georg Simon Ohm was the first person to study the relationship between resistance, current, and voltage. According to him, resistance is the measure of opposition to the flow of electric current in a circuit. The SI unit of resistance is known as ohm (Ω), after its founder. Examples of resistance can be

To ensure the safety and management of the system, all fuses should be replaced with MCB “Miniature Circuit Breaker.” An MCB, unlike a fuse, is an automated switch that opens in the event of excessive current flowing through the circuit and can be reclosed without the need for manual replacement. Most circuits employ MCBs as

A cell is a source of energy in an electrical circuit; two or more combinations of cells form a battery. An electrochemical cell converts the electrical form of energy into the chemical form of power. Alessandro Volta invented the concept of an electric battery; the physical quantity voltage has its SI unit in Volts, named after

Resistivity, also known as specific electric resistance, is the efficiency of a material to oppose or resist the flow of charge or current. It depends on the material’s behaviour and the temperature. It doesn’t matter what the shape is and the size of the particular substance. The ohm metre is the SI unit for measuring

Both alternating and direct current flow in a circuit; while the electric current flows in a single direction in direct current or DC, the electric current flow direction changes at regular intervals in alternating current or AC. AC also requires a simple production process and is thoroughly economical. The energy transmission over long distances is