Electric current: Ohm’s law, resistivity

A cell or an electrochemical cell are devices applied for developing electrical energy from chemical processes or vice versa. EMF stands for Electromotive Force and is measured in coulombs of charge. It is created by pressure or an electric intensity due to electrical energy or a source.  Internal resistance is the barrier to the passage […]

Every substance is made up of atoms consisting of negatively charged electrons. Within the atom, these negatively charged electrons move in a random pattern. The movement of electrons results in the generation of electricity. However, electrons in a material have a zero average velocity because of their random motion.  Drift velocity refers to the velocity

Electric current flows charged particles, typically electrons, through a wire or space in an electric field. The SI unit of electric charge is the coulomb. The SI unit of electric current, the ampere (A), was defined in 1835 by André-Marie Ampère as one joule per second. It should not be confused with the electrical current

Introduction The current is determined by the flow of electric charges, referred to as electricity. Electricity has become more and more important to humans as the world continues to expand. From ceiling fans inside rooms to heavy machines in factories, everything relies on electricity. Electric potential is a key element of electricity. For electrons to

Electricity is the flow of electric charges through a metal. The flow of electric charges can be expressed in terms of the potential difference, current, voltage and resistance. Charge and current are closely related concepts that are explored in this post. Electricity is a physical phenomenon in which charged particles flow from one place to

Impedance is an important concept in the study of electronics. Derived from the study of AC analysis, impedance, which is denoted by the letter ‘Z’, measures the resistance (R) to the flow of electricity in a circuit. This resistance, named after its founder, is measured in ohms. Impedance and resistance remain the same in DC

Electric current flows charged particles, typically electrons, through a wire or space in an electric field. The SI unit of electric charge is the coulomb. The SI unit of electric current, the ampere (A), was defined in 1835 by André-Marie Ampère as one joule per second. It should not be confused with the electrical current

Introduction Electrical resistivity and conductivity are two sides of the same coin, but they’re essential concepts to understand when studying electronics. They’re two different ways of expressing the same fundamental physical property: how easily electric current flows through a substance. Electrical resistivity is a material attribute that indicates how much it resists the flow of

When an electric current flows through a bulb or any conductor, the conductor provides some resistance to the current, which is known as electrical resistance and is denoted by R. Every material has an electrical resistance, which is why conductors emit heat when current flows through them. A resistor is an electric component that provides

Introduction: Electrical Resistance is one such topic including the resistivity, factors affecting these two, their relation, etc. The opposition to current flow in an electrical circuit is measured by resistance (also known as ohmic resistance or electrical resistance). The Greek letter omega (Ω) is used to represent the SI unit of resistance which is ohms.