Question

Right Hand thumb rule

Answer 1

Right hand thumb rule is generally to find out the direction of the magnetic field in electromagnetism.... In this your thumb must be towards the direction of current and then you must observe whether the other fingers of your hand is encircling in a clockwise or an anti-clock wise direction...

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Answer 2

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.