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Electricity and Magnetism
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Ohm's Law
Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points, expressed as .
Coulomb's Law
Coulomb's Law quantifies the amount of force between two stationary, electrically charged particles: .
Faraday's Law of Electromagnetic Induction
Faraday's Law states that the induced electromotive force in any closed circuit is equal to the negative of the time rate of change of the magnetic flux enclosed by the circuit: .
Lenz's Law
Lenz's Law states that the direction of the induced current is such that it opposes the change in magnetic flux that produced it, as defined by Faraday's law.
Lorentz Force
The Lorentz force is the force exerted on a charged particle moving through an electric and magnetic field: .
Capacitance
Capacitance is the ability of a system to store an electric charge, defined as , where is the charge and is the voltage.
Ampere's Law
Ampere's Law relates the integrated magnetic field around a closed loop to the electric current passing through the loop: .
Maxwell's Equations
Maxwell's Equations are a set of four equations that form the foundation of classical electrodynamics, classical optics, and electric circuits.
Electrical Resistance
Electrical resistance is a measure of the degree to which an object opposes the passage of an electric current, , where is resistivity.
Magnetic Flux
Magnetic flux is a measure of the amount of magnetic field passing through a given area, defined as .
Electric Field
An electric field is a vector field around charged particles that represents the force exerted on other charged particles, defined as , where is force.
Magnetic Field
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, materials, and currents.
Inductance
In inductance, a change in current in one coil will induce a voltage in a neighboring coil, defined as .
Kirchhoff's Voltage Law
Kirchhoff's Voltage Law states that the sum of all voltages around a closed loop must be zero.
Kirchhoff's Current Law
Kirchhoff's Current Law states that the total current entering a junction must equal the total current leaving the junction.
Electric Potential
Electric potential is the amount of electric potential energy per unit charge at a point in a static electric field, .
Electromagnetic Waves
Electromagnetic waves are waves of electric and magnetic fields that transport energy and travel through space at the speed of light, governed by Maxwell's equations.
Gauss's Law
Gauss's Law relates the electric flux through a closed surface to the charge enclosed by that surface: .
Series and Parallel Circuits
In series circuits, components are connected end-to-end, while in parallel circuits, they are connected alongside each other, affecting resistance and current flow.
Joule's Law
Joule's Law deals with the heat produced by an electric current, expressed as , where is power.
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