Current Electricity

Electricity is an undeniable necessity in modern society. Studying the origins and definitions of electricity and electric current is essential to understanding its various uses. The current in a conductor is defined by free electrons that exhibit random zigzag motions. This is the flow of charged particles, especially electrons, in a conductor under the action […]

When a potential difference is applied across the ends of the conductor, the electric field is generated within the conductor and the free electrons experience force in the opposite direction of the applied electric field. The potential difference applied does not accelerate the electrons but provides a constant velocity in the direction contrary to the

“Any linear circuit involving numerous voltages and resistances can be replaced by just one single voltage in series with a single resistance connected across the load,” according to Thevenin’s Theorem. To put it another way, any electrical circuit, no matter how complicated, can be reduced to a two-terminal equivalent using only a single constant voltage

The flow of charge is the rate at which electric charge moves through a conductor. One of the four fundamental types of elementary currents, electric current, is a flow of electric charges. The simplest way to think about this idea is to remember that electrons in a conductor will conduct electricity. The conducting material allows

A direct current (DC) refers to the electric charge that flows in one direction. A direct current passes through conductors such as wires, semiconductors, insulators or in a vacuum. In direct currents, electrons only migrate from a negatively charged area to a positively charged area in one direction. A battery is a prime example of

The alpha (α) constant represents the resistance change per degree of temperature change and is known as the temperature coefficient of resistance. Like all materials have a specified resistance at 20° C, they vary their resistance by a specific amount with temperature change. It is a positive value for pure metals, increasing temperature resistance. This

Internal resistance is the barrier to current flow supplied by the cells and batteries themselves, resulting in heat creation. Ohms are used for measuring internal resistance. The relation between electromotive force (e) and internal resistance (r) in cells is represented by: e = I (r + R) Where e is the electromotive force (Volts), R

Electric current when flowing from a bulb, some obstruction is offered on the current flow path by the conductor. The conductor’s obstruction in the current flow path is known as electrical resistance. R denotes the electrical resistance, since every electrical object is known to have a specific electrical resistance. And because of this, when current

While many experiments are performed especially to show that some things are almost equal to the electric field, Ohm’s Law states that the electric current flowing from any conductor is directly proportional to the potential difference (voltage) between its terminals, assuming that the conductor’s physical condition does not change. In other words, the ratio of

The movement of charged particles or atoms through a conductor or space is called current. The S.I unit is Ampere. Current is generally of two types- Direct Current is a type of current that flows or moves only in one direction. Alternating Current changes its direction or flow of current over time.  In this article,