To find the polarity of a solenoid, you can use the right-hand rule for current (or left-hand rule for electrons since they go in the opposite direction to the current). To do this, point your right thumb in the direction that the current travels in the coiled wire in the solenoid and curl your fingers.
:- The magnetic fields produced by the solenoid are similar to the magnetic field produced by a bar magnet. The polarity of the magnetic field (that is, which end is magnetic-north or magnetic-south) can be found from the Right hand thumb rule. If we hold the solenoid in our right hand, so that the fingers curl around it in the direction of the conventional current flow, then the thumb will point to the north.
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To find the polarity of a solenoid, you can use the right-hand rule for current (or left-hand rule for electrons since they go in the opposite direction to the current). To do this, point your right thumb in the direction that the current travels in the coiled wire in the solenoid and curl your fingers.
:- The magnetic fields produced by the solenoid are similar to the magnetic field produced by a bar magnet. The polarity of the magnetic field (that is, which end is magnetic-north or magnetic-south) can be found from the Right hand thumb rule. If we hold the solenoid in our right hand, so that the fingers curl around it in the direction of the conventional current flow, then the thumb will point to the north.
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