Transformer and its working principleA transformer is an electrical device used to change the voltage levels in an AC circuit.It operates on the principle of electromagnetic induction and mutual induction between two coils.Working…
Lenz’s law, induced EMF, and applicationsLenz's Law explains the direction of the induced EMF and current in electromagnetic induction.It is an extension of Faraday's laws of electromagnetic induction, focusing on the conservation of energy…
Faraday’s laws of electromagnetic inductionElectromagnetic induction is the process of generating an electromotive force (EMF) by changing the magnetic field around a conductor.Discovered by Michael Faraday in 1831, this phenomenon is the…
Electromagnets and applicationsBasics of ElectromagnetsAn electromagnet is a type of magnet created by passing an electric current through a coil of wire.The magnetic field is produced by the electric current, and it disappears…
Earth’s magnetism, magnetic declination, and dipEarth's MagnetismEarth behaves like a giant magnet with a magnetic field generated by the movement of molten iron and nickel in its outer core.The Earth's magnetic field protects us from solar wind…
Magnets, magnetic field, magnetic lines of forceMagnetsA magnet is an object that generates a magnetic field and can attract ferromagnetic materials like iron, nickel, and cobalt.Natural magnets are naturally occurring substances like magnetite,…
Electric power, heating effect of currentElectric PowerElectric power is the rate at which electrical energy is consumed or produced in a circuit.The formula for electric power is P = VI, where P is power, V is voltage, and I is current.…
Series and parallel circuits, applications of resistorsSeries CircuitsIn a series circuit, components are connected end-to-end so that the current flows through each component sequentially.The same current flows through all components in a series circuit…
Electric current, Ohm’s law, resistance, and resistivityElectric CurrentElectric current is the rate of flow of electric charge through a conductor.The formula is I = Q/t, where I is current, Q is charge, and t is time.It is a scalar quantity and is…
Electric potential, potential difference, and capacitorsElectric PotentialElectric potential is the amount of work done to bring a unit positive charge from infinity to a point in an electric field.It is a scalar quantity and is measured in volts (V).The…