Question

how many types of vector

Answer 1

Types of vectors
In general vectors may be divided into three types.

Proper vectors
Axial vectors
Inertial or pseudo vectors
Proper vectors
Displacement ,force,momentum etc are the proper vectors.

Axial vectors
The vectors which act along the axis of rotation are called axial vectors.For example ,angular velocity,torque,angular momentum,angular acceleration are axial vectors.

Pseudo or inertial vectors
The vectors used to make an inertial frame of reference into inertial frame of reference are called pseudo or inertial vectors.

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Answer 2

The four major types of vectors are:-
[1] Plasmids
[2] Viral
[3] Cosmids
[4] Artificial Chromosomes