Course description

Electric field & Electric potential:

Ø Electric field is defined as the electric force per unit charge.

Ø  The direction of the field is taken to be the direction of the force it would exert on a positive test charge.

Ø  The electric field is radically outward from a positive charge and radically in toward a negative point charge. 

Electric Potential

Electric potential is the electric potential energy per unit charge. It is known as voltage in general, represented by V and has unit volt (joule/C). 

1C charge is brought to the point A from infinity. Work done here is called potential of q at A. Electric potential is found by the given formula;

V = k.q/d

V is a scalar quantity. If q is negative then V becomes negative, or if q is positive then V becomes positive. 

Ø An electric potential (also called the electric field potential, potential drop or the electrostatic potential) is the amount of work needed to move a unit positive charge from a reference point to a specific point inside the field without producing any acceleration.

Ø  Typically, the reference point is Earth or a point at Infinity, although any point beyond the influence of the electric field charge can be used.

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