Question

what is right hand thumb rule ​

Answer 1

Answer:

When electricity (conventional current) flows in a long straight wire it creates a circular or cylindrical magnetic field around the wire according to the right-hand rule. ... If the fingers of the right hand are curled in the direction of the circular component of the current, the right thumb points to the north pole.

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Answer 2

Answer:

FULLY EXPLAINED ANSWER :

1. When electricity (conventional current) flows in a long straight wire it creates a circular or cylindrical magnetic field around the wire according to the right-hand rule. ... If the fingers of the right hand are curled in the direction of the circular component of the current, the right thumb points to the north pole.
2. Some would claim that there is only one right-hand rule, but I have found the convention of three separate rules for the most common situations to be very convenient.
3. These are for

• long, straight wires,
• free moving charges in magnetic fields, and the solenoid rule
• which are loops of current