PHYSICS – STATIC ELECTRIC – ELECTRIC FIELD

PHYSICS – STATIC ELECTRIC – ELECTRIC FIELD

Electric field is defined as the electr force per unit charge. The electric field radially outward from positive charge and radially toward a negative point charge.

 


Define the electrc field in the center of the square if :

a.   The 4 charges are negative

b.   4 charges  in sequences negative-positive-negative-positive

c.   4 charges  in sequences positive-positive-negative-negative

d.   One of the charge is negative and the others are positive

a. The 4 charges are negative :

there are the same amount electric field towards each charges but opposite directions, so, all electric fields get eliminated. And the center have no electric field left. Zero electric field

b. The 4 charges in sequences negative-positive-negative-positive:

A and C charges have same amount electric field (because same amount of charges), but opposite directions, so do C-B charges.