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Voltage is generated by basically spinning a magnet inside a coil of wire. The magnet is made up of a north and south pole. As one of the poles cuts through the cross section of the coil of wire it will induce a voltage that will increase and decrease and the pole moves towards and away from the coil of wire. This produces the top portion of your sine wave, the first direction. Once that is done, the other pole will do exactly the same thing produce a voltage the will increase and decrease as the pole moves towards and away from the coil of wire. But this time the pole has the opposite polarity so it will produce a voltage with a opposite polarity. This makes up the second portion of you sine wave.
So it is the voltage generated that changes polarity from positive to negative. Since current and power are dependent on voltage they also will change their direction. That is a very brief description of AC electricity.
AnswerPower does not change direction in an a.c. system.
What else can I help you with?
What does not change direction in electricity?
Direct current (DC) does not change direction in electricity. It flows consistently in one direction from the positive to the negative terminal of a power source, unlike alternating current (AC) which changes direction periodically.
In India the alternating current ac change its direction time within one second?
I believe India runs on 50Hz power, so 100 times.
What is the name of the current which reverses direction every half turn?
The current you are referring to is called an alternating current (AC). It changes direction periodically to allow for efficient transfer of electricity in power distribution systems.
What is main difference between ac power and dc power?
AC power is made by alternating current and DC does not change.
What are the differences between AC power and DC power?
The description AC/DC refers to equipment designed to be operate on either alternating current (AC) or direct current (DC). In alternating current the movement of electric charge periodically reverses direction. In direct current , the flow of electric charge is only in one direction.
What type of current is used to power electrical outlets in the US?
AC, alternating current is used to power electrical outlets in the U.S..
Alternating currents travels in only one direction and is the type of current that most electronic devices require including computers?
It seems there is a misconception. Alternating current (AC) constantly changes direction, while direct current (DC) flows in one direction. Most electronic devices, including computers, typically require direct current for operation, but they convert AC from the mains power supply using a power adapter or internal power supply unit.
What Current is one that reverses direction at regular intervals?
An alternating current (AC) is a type of current that regularly changes direction, typically many times per second. This alternating flow of electric charge is commonly used in households and businesses to power electrical devices.
Does current flow in all AC motors alternate direction?
Yes, in alternating current (AC) motors, the current flows in alternating directions. This is due to the nature of AC power, where the voltage periodically reverses direction, causing the current to do the same. This alternating current creates a rotating magnetic field that drives the motor's rotor. In contrast, direct current (DC) motors have current that flows in a single direction.
What is an electric current that periodically changes direction?
An electric current that periodically changes direction is called an alternating current (AC). In AC circuits, the flow of electric charge reverses direction many times per second, typically at a frequency of either 50 or 60 Hz. This is in contrast to a direct current (DC) in which the flow of electric charge remains constant in one direction.
What is direct and alternating voltage?
An alternating current (AC) is an electric current whose direction reverses cyclically, as opposed to direct current, whose direction remains constant. The usual waveform of an AC power circuit is a sine wave, as this results in the most efficient transmission of energy.
How does the electrical power flow in a circuit that continually switches direction?
In a circuit that continually switches direction, the electrical power flows back and forth in a cyclical manner. This is known as alternating current (AC) flow, where the electrons move back and forth, changing direction periodically.
