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24 results for “electricity”

Formulae (24)

Ohm's Law

V = IR

Voltage equals current times resistance.

PhysicsBasic

Electrical Power

P = VI = I^2R

Power dissipated in an electrical component.

PhysicsAdvanced

Coulomb's Law

F = k\frac{q_1 q_2}{r^2}

Electrostatic force between two charges.

Physics Laws & TheoremsBasic

Ohm's Law

V = IR

Voltage across a resistor equals current times resistance.

Physics Laws & TheoremsIntermediate

Coulomb's Law

F = k\frac{q_1 q_2}{r^2}

Electrostatic force between two point charges.

Physics Laws & TheoremsIntermediate

Conservation of Charge

\sum q = \text{constant}

Total electric charge in an isolated system is conserved.

Electricity & MagnetismIntermediate

Coulomb's Law

F = k\frac{q_1 q_2}{r^2}

Force between two point charges.

Electricity & MagnetismBasic

Electric Field

E = \frac{F}{q}

Force per unit charge at a point.

Electricity & MagnetismIntermediate

Field of a Point Charge

E = k\frac{q}{r^2}

Electric field around a point charge.

Electricity & MagnetismIntermediate

Electric Potential

V = k\frac{q}{r}

Potential due to a point charge.

Electricity & MagnetismIntermediate

Electric Potential Energy

U = k\frac{q_1 q_2}{r}

Energy of two interacting charges.

Electricity & MagnetismAdvanced

Gauss's Law

\Phi_E = \frac{Q_{enc}}{\varepsilon_0}

Electric flux through a closed surface.

Electricity & MagnetismAdvanced

Parallel-Plate Capacitance

C = \frac{\varepsilon_0 A}{d}

Capacitance from plate area and separation.

Electricity & MagnetismIntermediate

Magnetic Force on a Charge

F = qvB\sin\theta

Force on a moving charge in a magnetic field.

Electricity & MagnetismIntermediate

Force on a Current Wire

F = BIL\sin\theta

Force on a current-carrying conductor.

Electricity & MagnetismAdvanced

Field of a Straight Wire

B = \frac{\mu_0 I}{2\pi r}

Magnetic field around a long straight wire.

Electricity & MagnetismAdvanced

Field Inside a Solenoid

B = \mu_0 n I

Magnetic field inside an ideal solenoid.

Electricity & MagnetismAdvanced

Faraday's Law

\mathcal{E} = -N\frac{d\Phi_B}{dt}

Induced EMF from changing magnetic flux.

Electricity & MagnetismIntermediate

Magnetic Flux

\Phi_B = BA\cos\theta

Flux through a surface in a magnetic field.

Electricity & MagnetismAdvanced

Motional EMF

\mathcal{E} = BLv

EMF from a conductor moving through a field.

Electricity & MagnetismAdvanced

Cyclotron Frequency

f = \frac{qB}{2\pi m}

Rotation frequency of a charge in a magnetic field.

Electricity & MagnetismAdvanced

EM Energy Density

u = \tfrac{1}{2}\varepsilon_0 E^2 + \frac{B^2}{2\mu_0}

Energy stored per unit volume in EM fields.

Electricity & MagnetismAdvanced

Speed of Light (EM)

c = \frac{1}{\sqrt{\mu_0 \varepsilon_0}}

Light speed from vacuum constants.

Environmental ScienceBasic

Energy Consumption

E = P \times t

Electrical energy used over time.