Question

what is right hand screw rule in vector ? explain.

Answer 1

The direction of the cross product may be found by application of the right hand rule as follows: The index finger points in the direction of the velocity vector v. The middle finger points in the direction of the magnetic field vector B. The thumb points in the direction of the cross product F.

Answer 2

The right hand screw rule can be used when a direction must be determined based upon a rotational direction, or vice versa. The axis is 'grasped' in the right hand, the fingers curl round in the direction of positive rotation and the thumb is orientated in the positive direction. ...