Question

state right hand thumb rule ​

Answer 1

right hand thumb rule:-

imagine that you have held the conductor in your right hand in such a way that your thumb points in the direction of current. then turn your fingers around the conductor, the direction of the fingers is the direction of the magnetic lines of force .

Answer 2

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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.