Question

How the direction is determined in vectors cross product?​

Answer 1

The direction in vector cross product is determined by the right hand screw rule and the right hand thumb rule.

For example: When A×B=C, then the direction of C is right angles to the plane having vectors A and B.

• Right hand screw rule - Let the first vector be A from where the right hand screw is rotated, and towards the vector B. So the direction in which the right handed screw is rotated gives the direction of C.
• Right hand thumb rule - Here the fingers of the right hand are curled from Vector A to B. Then the direction of erect thumb will give the direction of C.

Answer 2

Answer:

Explanation:

By convention, the direction of the vector n is given by the right-hand rule, where one simply points the forefinger of the right hand in the direction of a and the middle finger in the direction of b. Then, the vector n is coming out of the thumb (see the adjacent picture).