whos knows anything about current and voltage phase change..........?

Question

C.I.V.I.L = capacitor - current - voltage -current - inductor

WHATS PHASE CHANGE - CURRENT AND VOLTAGE PHASE CHANGE

Answer 1

Electricity moves very quickly but not instantaneously.
When a Voltage is first applied to a capacitor it first looks like a short circuit so no voltage is measurable across the capacitor. However a large current does flow; charging the capacitor.
After a short time the capacitor is charged and there is no more current flow but there now is a voltage across the capacitor. The voltage lags behind the current flow.
When you feed constantly alternating current to a capacitor this shows up as a 90 degree phase shift of the voltage behind the current.
Coils (inductances) are just the opposite.
When you first apply a voltage to a coil it must construct a magnetic field. This, at first, shows up as an infinite resistance so you measure the full voltage across the coil but no current flow. (It is caused by the counter-EMF i.e. the changing magnetic field of the coil induces a counter-voltage that blocks any current flow. (at first)).
When the magnetic field stabilizes (i.e. stops changing) the counter-EMF disappears and the voltage is then blocked only by the Ohmic Resistance (usually negligible) and the current can flow freely.
When the voltage starts to drop the collapsing magnetic field induces a voltage in the coil that tries to keep the current flowing.
When you feed AC to a coil it looks like the current is lagging 90 degrees behind the voltage.

Answer 2

in case you multiply the voltage at an on the spot in time by the present at that comparable on the spot, the product is the potential at that on the spot. If the present is in section with the voltage, the present is constructive each and each time the voltage is constructive and destructive each and each time the voltage is destructive. subsequently, if the present is in section with the voltage, the manufactured from contemporary superior by voltage, the potential, is constructive at each and every on the spot in time. If the present isn't in section with the voltage, there are some durations of time wherein the voltage and contemporary have opposite polarities. for the duration of those durations, the manufactured from voltage and contemporary is destructive, and subsequently the potential is destructive. destructive potential is potential flowing from the burden to the resource. If somewhat some the potential is flowing lower back and forth between the burden and resource, that potential is in simple terms circulating lower back and forth, not doing paintings. contemporary that doesn't make a contribution to turning in potential is, in a feeling, pointless contemporary. pointless contemporary motives the generator, wiring, transformers etc. to be extra advantageous than they might desire to be to hold a given quantity of potential. the extra advantageous contemporary additionally motives extra advantageous losses interior the wiring and kit. with the intention to maintain the rotating magnetic field in an AC motor, extra advantageous contemporary is needed above the present required to grant potential to the motor. even nevertheless, that contemporary can rather by offering capacitors to keep potential close to the motor and accommodate circulating potential somewhat than permitting it to pass between he generator and the motor.

Answer 3

whats your question?