difference between a.c. current and d.c. current ??
Answers
Explanation:
Direct current (DC) is the flow of electric charge in only one direction. It is the steady state of a constant-voltage circuit. ... Alternating current (AC) is the flow of electric charge that periodically reverses direction.
Both AC and DC describe types of current flow in a circuit. In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically.
Direct current is not used at home because for the same value of the voltage, DC is more lethal than AC since direct current does not go through zero.
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Explanation:
Electricity comes in two forms—alternating current (AC) and direct current (DC). Both are essential to enable the functioning of our electronics, but do you know the difference between the two and what they apply to?
What is AC power?
Alternating current (AC) power is the standard electricity that comes out of power outlets and is defined as a flow of charge that exhibits a periodic change in direction.
AC's current flow changes between positive and negative because of electrons—electrical currents come from the flow of these electrons, which can move in either a positive (upward) or negative (downward) direction. This is known as the sinusoidal AC wave, and this wave is caused when alternators at power plants create AC power.
Alternators create AC power by spinning a wire loop inside a magnetic field. Waves of alternating current are made when the wire moves into areas of different magnetic polarity—for example, the current changes direction when the wire spins from one of the magnetic field's poles to the other. This wave-like motion means that AC power can travel farther than DC power, a huge advantage when it comes to delivering power to consumers via power outlets.
What is DC power?
Direct current (DC) power, as you may suss from the name, is a linear electrical current—it moves in a straight line.
Direct current can come from multiple sources, including batteries, solar cells, fuel cells, and some modified alternators. DC power can also be "made" from AC power by using a rectifier that converts AC to DC.
DC power is far more consistent in terms of voltage delivery, meaning that most electronics rely on it and use DC power sources such as batteries. Electronic devices can also convert AC power from outlets to DC power by using a rectifier, often built into a device's power supply. A transformer will also be used to raise or lower the voltage to a level appropriate for the device in question.
Not all electrical devices use DC power, though. Many devices, household appliances, especially, such as lamps, washing machines, and refrigerators, all use AC power, which is delivered directly from the power grid via power outlets.