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Answer:
A. For the loop or coil to rotate 360 degrees in the field, the current running through the loop must reverse direction twice in one complete turn.
Explanation:
In an electric motor, the armature (or coil) keeps rotating due to the continuous reversal of current direction. As the armature turns, the commutator switches the current direction every half turn (180 degrees). This reversal creates a continuous force that keeps the armature rotating through 360 degrees.