As such, Galilean electromagnetism can be used to regroup and explain the somehow dynamic but non-relativistic quasistatic approximations of Maxwell's equations.
22.
In the example of the water given above, if the stirring is done slowly, the transition from cool water to warm water will be quasistatic.
23.
In this point of view the quasistatic approximation is obtained by using time instead of retarded time or equivalently to assume that the speed of light is infinite.
24.
Because the quasistatic region is defined within one wavelength of the electromagnetic source, emitters are limited to a frequency range between about 1 kHz and 1 MHz.
25.
At low frequencies the rate of change of the instantaneous field strength with each cycle is relatively slow, giving rise to the name " magneto-quasistatic ".
26.
The near field or quasistatic region typically extends no more than a wavelength from the antenna, and within this region the electric and magnetic fields are approximately decoupled.
27.
The net entropy change from the initial state to the final state is independent of the particular choice of the quasistatic route, as the entropy is a function of state.
28.
The quasistatic approximation can be understood through the idea that the sources in the problem change sufficiently slowly that the system can be taken to be in equilibrium at all times.
29.
In simple cases, the quasistatic approximation is allowed when the typical spatial scale divided by the typical temporal scale is much smaller than the characteristic velocity with which information is propagated.
30.
However, a system containing an exploded firecracker is adiabatically accessible from a system containing an unexploded firecracker ( but not vice versa ), and this transition is far from quasistatic.
