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electric current - How does an AC circuit get anything done? - Physics . . . What if we replace the battery with an AC voltage source? Now when the voltage becomes negative, both the electric field and the current (and therefore the magnetic field) reverse their direction These changes cancel each other out and the Poynting vector still points to the right
What are the fields produced around a current carrying conductor? For the AC case, solving for the fields becomes wildly complicated very fast as now the electric field driving particle currents has both a voltage source and a time-varying magnetic source through the magnetic vector potential
What is meant by alternating current reversing direction The electricity, or more precisely, electric current is flowing in a loop When the electricity is delivered to your house, the loop is formed by a generator (the source of the electricity), an electric device in your house (the load) and two wires In reality the picture is a little more complicated, but the idea is the same When we say that an alternating current reverses its direction, we
quantum mechanics - Building intuition for the AC Stark shift - Physics . . . The AC Stark shift is linear in power (second order in electric field) The net shift is a total sum over terms like Ω2 Δ Ω 2 Δ for all excited states accessible from the ground state Over the years I've grown to accept the math, but recently I've found it a bit difficult to convey these concepts intuitively
electricity - In an alternating current, do electrons flow from the . . . The question is based on my incorrect understanding of electric current If electric current is flow of electric charge which is carried by free moving electrons, then I can understand DC When I read the defintion of AC as movement of electic charge that periodically changes direction (like back forth) along the line of flow, then how is there is a movement of charge Answers given by
Does alternating current (AC) require a complete circuit? Wherever there is an AC electric field in space around an AC circuit, there are source charges repeatedly bunching up and gathering and then draining somewhere in the circuit and the displacement current measures this "compressible" part of the conduction current flow that leads to these oscillating excess charge densities
Why is AC more dangerous than DC? - Physics Stack Exchange Alternating current (AC), because it alternately reverses direction of motion, provides brief moments of opportunity for an afflicted muscle to relax between alternations Thus, from the concern of becoming "froze on the circuit," DC is more dangerous than AC