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A small disadvantage of delivering electrical current as alternating current (AC) is that any electrical equipment which needs direct current (DC) cannot run on it. In order to run such equipment, the AC has to be rectified to convert it to DC.

Alternating current (AC) has sinusoidally varying voltages and currents which flow backwards and forwards, unlike direct current (DC), which does not change its direction of flow. Because of this, Transformers can easily be used to convert AC voltages and currents, meaning that AC can be very efficiently transported over long distances and then distributed in local communities. AC is more commonly used than DC for electrical power distribution simply because transformers do not work on DC.

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13y ago

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