What is unit vector :- explain unit vector

Electromagnetic fields

Unit vector-

A unit vector has a function to indicate the direction. Its magnitude is always unity, irrespective of the direction which it indicates and the co-ordinate system under consideration. Thus for any vector, to indicate its direction a unit vector can be used. Consider a unit vector āoA in the direction of OA as shown in o the Fig. This vector indicates the direction of OA but its magnitude is unity. Fig

Unit vector aOA

So vector OA can be represented completely as its magnitude R and the direction indicated by unit vector along its direction.

ŌĀ = |OA| āOA =R āOA

āOA=1

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