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A. |
decrease the voltage in a transformer
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A
split-ring commutator is used to change the direction of the current going
through the armature of a DC motor. This allows the armature to spin
the same direction because the torque acts in the same direction all the
time.
An AC motor uses two commutators. The
direction of the current automatically changes because it is an
alternating current.
The Correct Answer is B. |
