Electric current: Ohm’s law, resistivity

The resistance of a conductor is a measurement of the conductor’s resistance to current flow. The resistance to current flow varies between conductors. The letter R stands for resistance. A conductor’s resistance, R, is defined as the ratio of the potential difference, V, across it to the current, I, flowing through it.The ohm is the […]

The energy generated from the potential or kinetic energy of charged particles is called electrical energy. The flow of electrons from one location to another generates electrical energy, which may be defined as the energy transferred between the two points and thus, electric power is created. The flow of charged particles via a medium (say,

Introduction An LCR series circuit is a circuit that contains resistance, capacitance and inductance in series across an alternating current.  Reactance The inertia against the flow of electrons in an electrical circuit is called reactance. It is also called an imaginary resistance of an electrical circuit. It is measured in ohm and denoted as R.

Reactance (X) is defined as the obstruction present in alternating current by either inductance or capacitance in electrical circuits. The term ‘reactance’ was coined by M. Hospitalier, a French engineer, in the year 1893. It is important to understand that reactance and resistance are not the same. The difference between reactance and resistance is that

Introduction:  Conductors are materials that contain moving charges. In conductors, electrons are movable charged particles. Due to these freely movable electrons, conductors conduct electricity easily. The common electrical conductors are metals. All conductors contain a charge that moves when a potential difference (measured in volts) is applied to various points in the material. This charge

The voltage or current characteristics of an electrical component or device are called V-I characteristics. Using a V-I graph, you may learn about a component’s resistance and deconstruct it. A component’s functional area may also be found here. An electric circuit can be better understood by studying a component’s properties. An electronic component’s voltage-ampere characteristics

In AC circuits, power is defined as the quantity of energy delivered by a circuit per unit of time. There is a lot of importance of power in an ac circuit. It’s used to calculate how much total energy is required to run a load.  A power factor in an AC circuit is described as

Potential difference is the difference in electric potential between two points. For example, if we take a copper wire, electricity will not flow through it until it is triggered by a potential difference between the two points of the wire. When two negative (-) charges are brought close together, they repel each other due to

Introduction The potential difference between the two points reflects the work or energy released in the movement of a unit quantity of electricity from one point to the other. This is a key topic for the Class XI examinations, among others. Subjects in the Class XI curriculum are linked to a variety of courses, and

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