Author Topic: WHAT ARE Electric FieldS  (Read 985 times)

0 Members and 1 Guest are viewing this topic.

Offline Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 3607
WHAT ARE Electric FieldS
« on: August 16, 2012, 18:59:01 pm »

One source of electric field is that developed around charges.

Another which is called circular is derived from EM induction.

Other sources are electrochemical cells...

Electric field is defined as the force that an electric charged particle would feel if placed at a point with a given electric field intensity. 

The force is equal to the product between the charge of the particle and the electric field at that point.

Circular electric fields are closed, in the sense that for current to flow it must be a closed loop...

Charges electric fields also need the circuit to be "touched" to be discharged but once that is done no current flow anymore...

They differ from each other but when high voltage is in the game. The charge densities of the circular system can become significant and so the electric fields of high voltage terminations at transformers indeed have charge separation and thus an electric field...A prof of this is that fluorescent bulbs lights close to them. Depending on parameters like self capacitance and winding leads capacitance this effect can be hidden, so special geometric configurations can reveal this fields.

Tesla used this fields to light lamps in the past... This is what he called high potential illumination systems....

The induced electromotive force is proportional to the amount of work required to keep those charges apart.

FB=qvB FE=qE E=vB

FB = FE => qvB=qE

delta V = the EL or vBL

This means that magnetic forces separate the charges and cause a potential difference across L.
So if electric field inside the conductor is uniform the potential difference is V=EL

And as a conductor do not keep a charge inside of it, the electric field must jumps from its surface...

The electric field in relation to the induced voltage across a coil will depend on the length of the wire...