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What changes the alternating current?
As the wire spins and periodically enters a different magnetic polarity, the voltage and current alternate on the wire. This current can change direction periodically, and the voltage in an AC circuit also periodically reverses because the current changes direction.
What affects the flow of electrons?
Ohms are the measurement of resistance to the flow of electrons through a conductive material. The higher the resistance, the lower the flow of electrons. This resistance causes a certain amount of heat to be generated in the circuit.
What controls the flow of electrons in a circuit?
The power source moves the existing electrons in the conductor around the circuit. This is called a current. Electrons move through a wire from the negative end to the positive end. The resistor uses the energy of the electrons around the wire and slows down the flow of electrons.
How do Charges move in an alternating current?
In alternating current (AC), the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction. In alternating current, the charges move in one direction for a very short time, and then they reverse direction.
What is alternating current and direct current?
Alternating Current (AC) is a type of electrical current, in which the direction of the flow of electrons switches back and forth at regular intervals or cycles. Direct current (DC) is electrical current which flows consistently in one direction.
What affect the current flow?
Current is due to the flow of electrons. Resistance opposes current and therefore the higher the resistance, the smaller the current. Therefore the factors that affect the resistance are the same factors that control the flow of current through a wire.
What factors affect the flow of current?
What factors affect the size of an electric current?
- Potential Difference between ends (Voltage)
- Temperature.
- Material of wire.
- Length of wire.
- Area of Cross- section.
Does AC current flow from positive to negative?
Current direction Conventional current flows from the positive pole (terminal) to the negative pole. In an alternating current (AC) circuit the two poles alternate between negative and positive and the direction of the current (electron flow) reverses periodically.
Why does AC current flow on surface?
It’s because magnetic flux in the center of the conductor is more than on the surface so this increases the inductance of the inner layers of the conductor, current always takes the easy way so it will avoid this region with a high inductance (reactance) and will flow on the skin of the conductor.