Yes. I don't recall ever hearing of such a Clock rule in physics. I do agree with you that both A and B are South magnetic poles.MadMax_8228 said:
No, in normal conditions, the polarity at the two ends of a solenoid cannot be the same. A solenoid generates a magnetic field with a distinct north and south pole when an electric current passes through it.
The polarity of the ends of a solenoid is determined by the direction of the electric current flowing through the wire. Using the right-hand rule, if you curl the fingers of your right hand in the direction of the current, your thumb will point towards the north pole of the solenoid.
Yes, reversing the direction of the electric current flowing through the solenoid will reverse the polarity of its ends. The north and south poles will switch places when the current direction is reversed.
No, as long as there is an electric current flowing through the solenoid, it will always have a distinct north and south pole. The magnetic field generated by the solenoid inherently creates this polarity.
If the solenoid is not connected to a power source, no electric current flows through it, and therefore, it does not generate a magnetic field. In this case, the solenoid does not exhibit any polarity at its ends.