A de3nition of this quantity that takes the form of the Euler-Lagrange equations includes the expression "the negative gradient" of quantity "scalar potential minus the dot product of velocity and vector potential," close quantity, minus "the total derivative of vector potential.
A de3nition of this quantity that takes the form of the Euler-Lagrange equations includes the expression "the negative gradient" of quantity "scalar potential minus the dot product of velocity and vector potential," close quantity, minus "the total derivative of vector potential." The divergence of the Maxwell stress tensor, minus the product of "one over the speed of light squared" and "the time derivative of the Poynting vector," gives the value of this quantity in the continuum limit. The relativistic form of this quantity is proportional to the contraction of the contravariant electromagnetic 3eld strength tensor with the covariant four-velocity. In ideal magnetohydrodynamics, this quantity is decomposed into magnetic tension and magnetic pressure terms that produce circular motion around a guiding center. For 10 points, name this quantity that equals the sum of charge times the E-3eld and charge times the cross product of velocity with the B-3eld.
A de3nition of this quantity that takes the form of the Euler-Lagrange equations includes the expression "the negative gradient" of quantity "scalar potential minus the dot product of velocity and vector potential," close quantity, minus "the total derivative of vector potential.
Lorentz force [prompt on magnetic force or F; do not accept "Abraham-Lorentz force"]