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See voltage means potential difference. Electrons move from higher potential to lower potential always. In wire same thing happens. So electrons flow because there is potential difference and flow of electrons causes current to flow. current is nothing but flow of electrons. reply if u r satisfied @ rahul.khaladkar@rediffmail.com
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What is effect of voltage and current by changing the length of wire?
By changing the length of wire, say reducing it, the resistance will drop and that will increase current flow but the voltage is less likely to change V=IR.
How does the voltage applied to a circuit affect the current flowing through the wire?
Voltage is equal to the Current multiplied by the Resistance.Without changing the resistance, increasing the applied voltage in a circuit will increase current flow. There is a simple, direct relationship between voltage and current. Double the voltage, twice the current will flow. Triple the voltage, and the current will triple. As voltage (E) equals current (I) times resistance (R), when resistance is fixed, what happens to voltage will happen to current.
Will 2.5mm wire conduct 240 volts?
You size wire by the current. Various insulations are rated for voltage, temperature and the medium where the wire will be run.
How was the current electricity produced?
ELECT. CURRENT IS BASICALLY THE FLOW OF ELECTRONS FROM ONE POINT TO ANOTHER POINT IN THE CIRCUIT. IN, AC IT IS "PUSHED" THROUGH THE WIRE BY THE MAGNETIZED COIL. ELECTRONS ARE AFFECTED BY MAGNETISM. IN DC, ON PART OF THE BATTERY HAS LESS ELECTRONS THAN THE OTHER. WHEN THESE TWO ARE CONNECTED, THE ELECTRONS FLOWS TO THE HUNGRIER ATOMS. THESE PRODUCES CURRENT OR ELECTRICITY IN THE WIRE.
What are the factors on which the heat produced the electric current depends upon?
It depends on1 the resistance of wire.2the voltage between the ends of the wire.3the flowing current time.
What do you mean by Polarity for the following Electrical parameters Charge Voltage Current Meter probes?
Charge, + charge is a lack of electrons, - is an excess of electrons, compared to a reference point. Voltage, + voltage is measured at a point that has a lack of electrons, compared to a reference point. Current, + current flowing through a wire indicates that electrons are flowing in the opposite direction Meter probes, see voltage above.
Why does electric current flow into circuits?
It may not be correct to say that an electric current will "flow into" circuits. Electrons move in a circuit in response to an applied voltage. And these electrons are alread in the circuit and available to support current flow if a voltage is applied. It may be more correct to say that electrons leave the negative terminal of a voltage source, and electrons enter the positive terminal of that voltage source. The electrons in the circuit that are availble to support current flow will "shift over" to create the current flow. Remember that the phenomenon of current flow in a wire is the "shifting over" of electrons in the wire. It's not about electrons going into one end of a wire and those same electrons coming out the other end. Use the link to the related question for more information that might help make things clearer.
What causes electrons to move through a wire as a current?
A voltage, which is related to a change in an electric field.
Why is electricity related to voltage?
Because voltage is the power that makes electricity to circulate in a wire. Depending on the diameter, the lenght and material of the conductor (wire) the current, (the amount of electrons) flowing in the wire, the resistance will be lower or higher. Conclusively, the voltage is not the electricity itself, but it is like a pump that impulses the water through a pipe. Electricity is the current whose unit of measurement is the Ampere. So you have the voltage, resistance, and current in a electrical circuit on a direct current system.
How do you make lectricidy?
Electricity can be generated by moving a wire relative to a magnetic field. This induces a voltage in the wire (due to interaction of magnetic fields) which in turn induces a current if the wire is in a complete circuit. This current is the movement of electrons, also known as electricity.
Can you explain electric current?
Current is the flow of electrons in a system usually taught from positive to ground or zero potential. It is defined by the formula current = voltage/resistance Everything has resistance - even wire.
Does voltage play a role in an electromagnet?
Voltage is the "pressure" that pushes electrons thru a circuit, higher voltage means more current, or amperes. Amperes and the number of turns of wire in the magnet control the force of the magnet
How a battery makes electricity flow through a wire?
The battery provides the voltage, the voltage produces a current, according to Ohm's Law: V=IR, or I=V/R. "I" refers to the current. In terms of the individual electrons, the battery will attract electrons at one end, and repel them at the other end.
What happens to electrodes when electric current flows?
The electrons are forced to move in one direction (on average) through the wire, due to a voltage potential between one end of the wire and the other. The electrons are repelled away from the negative end and attracted toward the positive end. Current flowing through the wire induces a magnetic field around the wire.
Moving a magnet in and out of a coil of wire produces?
That will induce a voltage across the wire.
Why electron freely in a metal?
The term conductor is generally applied to a substance or material that has a lot of free electrons in it. The name conductor is applied because the free electrons are already there. A material does not have free electrons because it is a conductor, but is a conductor because it has a lot of free electrons. That said, let's look at what's going on. These free electrons have energies that permit them to "wander" through the conductor; they're not "locked into" the structure of the material. And when a voltage (potential difference) is applied, current flows through the conductor because the free electrons are moving. They're made to move by the applied voltage. If we take the case of a wire in a circuit, the wire is a conductor. This wire, say a copper one, has many free electrons in it, and when we apply a voltage, electrons move. The voltage forces electrons into one end of the wire, and the free electrons "shift over" and electrons emerge from the other end of the wire. This movement of free electrons in response to an applied voltage through an conductor is the essence of current flow in that conductor.
What happens to an electric current when the wire is made smaller?
Electric current as we usually describe it is the flow of electrons. Current is caused to flow by voltage, which can be looked at as "electrical pressure" that forces electrons to move. Currents can be made smaller or larger by decreasing the voltage across a fixed amount of resistance. As resistance is the quality of "resisting" or "limiting" current flow, we can change resistance to change current. For a give voltage, if we increase the resistance, we can make the current smaller, and if we decrease it, we can make current larger. In electronics, voltage equals current times resistance. E = I x R Also true is that current is equal to voltage divided by resistance. I = E/R As current equals volts divided by resistance, if we change one of them without changing the other, current will change. And in increase in voltage (with no change to resistance) will cause current to go up. The opposite is also true. Also, if we increase resistance (with no change in voltage), current will go down. And the opposite is true here, too.
