what is the right hand thumb rule? explain
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right-hand rule - to determine the direction of the magnetic force on a positive moving charge, point your right thumb in the direction of the velocity (v), your index finger in the direction of the magnetic field (B), and your middle finger will point in the direction of the the resulting magnetic force
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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.
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