DC Fan

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DC fans are powered with a potential of fixed value such as the voltage of a battery. In contrast, the alternating current fans, or AC fans, are powered with a changing voltage of positive and of equal negative value.

A DC motor uses an internal arrangement of magnets with opposing polarity. As current passes through the coil around this arrangement, a strong magnetic field is produced. This magnetic field then creates a torque that causes the motor to rotate.

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