Terms starting with J
4 terms
Jacobian Matrix
Mathematical & Computational Physics
Coordinate Transformation Factor
A matrix of all first-order partial derivatives of a vector-valued multivariable function, representing local linear coordinate transformations.
J_ij = ∂f_i / ∂x_j, dV' = |det J| dV
Josephson Effect
Condensed Matter & Materials Physics
mA (Current), μV (Voltage)
The quantum tunneling of Cooper pairs across a thin insulating barrier separating two superconductors (a Josephson junction).
I = I_c sin(Δφ), V = (ℏ / 2e) (dΔφ / dt)
Joule Heating
Electromagnetism & Electronics
J (Joules)
The process in which the flow of electric current through a conductor generates thermal energy due to electrical resistance.
H = I² R t = P t
Joule-Thomson Effect
Thermodynamics & Statistical Physics
K/Pa
The temperature change experienced by a real gas when throttled through an insulated porous plug or valve at constant enthalpy.
μ_JT = (∂T / ∂P)_H