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I have a couple of questions :-
The electric field lines point from positive charge to negative charge and the force follows the same direction, if the test charge is positive. However if the test charge is negative, it will be opp to the direction of electric field?
Is electric PE = -Work a fact?
Thus if an electron ( at a high potential) moves towards a proton (at a lower potential), i think in terms of energy. Thus, the PE will be negative, since it's a more stable system and the work done will be negative ( from PE=-W). Now who exactly is doing the work? Is it the electric field? In terms of electrostatic force, there will be an attraction and thus a -ve value for force, the V = -KQ/R and thus PE = -KQQ/R. The only thing that is confusing is work.
Also, if the electron were moving from low potential( where the protons are) to high potential (where electrons are) the PE= positive and work is negative.
How does a change in Electric field cause a change in magnetic field?
The electric field lines point from positive charge to negative charge and the force follows the same direction, if the test charge is positive. However if the test charge is negative, it will be opp to the direction of electric field?
Is electric PE = -Work a fact?
Thus if an electron ( at a high potential) moves towards a proton (at a lower potential), i think in terms of energy. Thus, the PE will be negative, since it's a more stable system and the work done will be negative ( from PE=-W). Now who exactly is doing the work? Is it the electric field? In terms of electrostatic force, there will be an attraction and thus a -ve value for force, the V = -KQ/R and thus PE = -KQQ/R. The only thing that is confusing is work.
Also, if the electron were moving from low potential( where the protons are) to high potential (where electrons are) the PE= positive and work is negative.
How does a change in Electric field cause a change in magnetic field?