We know that solenoids act as bar magnets if electric current passes through it. If current is allowed to flow in the above given solenoid (in the direction as shown), which pole would the left side of the solenoid act like?
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According to the clock rule , we have:
Here, we can clearly observe that the electric charge enters in an clockwise loop so the right end would be the north pole, and thus the polarity on the left end would inadvertently be North .