What is Direct Current ?

There is no hum because there is no cyclic change in current flow.

A particular circuit voltage or current does not depend on the past value of any circuit voltage or current.

The cost of converting DC current to AC is relatively high, so DC is typically cost-effective only for long-distance transmission but DC current is more effective for long-distance

high-voltage transmission because it results in less energy lost in transmission.

the system of equations that represent a DC circuit do not involve integrals or derivatives with respect to time.

DC is commonly found in many extra-low voltage applications and some low-voltage applications

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especially where these are powered by batteries or solar power systems

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Most electronic circuits require a DC power supply.

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Domestic DC installations usually have different types of sockets

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This is mostly due to the lower voltages used

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resulting in higher currents to produce the same amount of power.

Most automotive applications use DC.

Electrical devices that convert electricity directly into other forms of energy can operate just as effectively from

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The alternator is an AC device which uses a rectifier to produce DC.

Many telephones connect to a twisted pair of wires, and use a bias tee to internally

r DC current.

Nearly all modern electronic devices require direct current for their operation, however. Alternating current is still used to deliver electricity to the device