Electricity And Magnetism Study Guide

Electromagnetism: The relationship between electricity and magnetism - the 2 come up hand in hand, since electric currents produce magnetic fields!

Magnetic Field: The region surrounding a magnetic source in which the magnet has a detectable magnetic forcefulness. Magnetic materials and electrical currents both can create magnetic fields. SI units: T

Both magnetic and electric fields store energy and can be idea of every bit vector force fields that move particles in specific directions.

Magnetic Field Lines: Invisible lines that betoken the magnetic field of an area. They accept a management and point away from the north pole towards the due south pole. Like to electric fields, the density of the magnetic field lines indicates the forcefulness of the field. In the picture below, we can see the magnetic field is strongest near the poles of the magnet.

Prototype Credit: Mirek2, CC-Past-SA 3.0

Magnetic Flux: Measures how much magnetic field passes perpendicularly through a given expanse. We can think of information technology as how many magnetic field lines laissez passer through the region. SI units: Wb.

Solenoid: A curlicue of wires with turns that generates a compatible magnetic field.

Electromagnetic Induction: When a electric current is induced in a conductor moving through a magnetic field. To induce a current in a wire, we must change the magnetic fiux. To practice so, we can change the magnetic field, change the wire'due south orientation/area, or move the wire out of the magnetic field.

Inductance: The resistance of a wire to a change in current. SI units: H

Self Inductance: When the current in a wire changes, information technology creates a back emf, an induced voltage that opposes any change in current.

Common Inductance: The current in one coil of wire affects the current in another (induces an emf).

Inductor: Inductors resist changes in current past creating a dorsum emf. They are ordinarily no more than a coil of wires that wrap around a magnetic core.

Faraday's Law: The induced emf is proportional to the rate of change of the magnetic flux.

Lenz's Law: The induced current will e'er menstruum in the direction that generates a magnetic field to oppose the alter in flux.

RL Circuits: Circuit made up of a resistor, inductor, and voltage source.

LC Circuits: Circuit fabricated up of an inductor and a fully charged capacitor.

RLC Circuits: Excursion made up of an inductor, resistor, and fully charged capacitor.

Hall Effect: An consequence observed when current passes through a usher perpendicular to a magnetic field. The magnetic field will exert a strength perpendicular to the direction of the current, pushing the electrons to one side of the conductor and creating a potential difference across the two sides of the conductor.