0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What does voltage cause?
The ability of current to move through a wire.
Why does a compass needle move when placed near a wire carrying an electric current?
True... The wire carring current creates a slight magnetic field.
What is the condition that is necessary for a charge to move in a wire?
A device to get a current flow through a wire (i.e. from a battery) and no breaks in the wire.
What type of magnetic field do you get around the wire when an ac supply passes through it?
You get building a collapsing eddy currents that alternate in direction. The placing of another wire in this field will cause a current to be generated in the second wire. That is the basis of transformers.
What forms of electricity are caused by turning wire inside a magnet?
Rather than turning the wire, it needs to move through a magnetic field. Unless the magnet has infinite length, it will need to come back again, or form part of a coil, which turns within the field. I think the answer you are looking for is AC, (Alternating Current). This is because as the coil turns inside the magnetic field, it first cuts the field one way and then the other as part of its rotation. The direction of the current will also flow one way and then back the other. AC.
What are the similarities in AC and DC?
Both AC and DC are current methods in which electrons move along a wire
Why does the current in a live wire remain positive even when the current may be an ac souce?
I don't think it will. If the source is AC, the live wire will alternate as well.
Why neutral wire does not carry current in closed ac circuit?
The neutral wire does carry current in a closed AC circuit. Clamp a clamp on amp meter around the neutral wire directly after the circuit load and it will read the same current as is on the "hot" wire.
Can you use a fusible link wire with 115V AC current?
no
What is the relationship between current and frequency in AC circuit?
Two words: skin effect. Now let's chat. Picture a wire with DC flowing through it. We are going to look at a cross section of the wire without interrupting current flow. Make sense? Picture it. When current flows in a wire in only one direction (DC), it uses all the available metal in the wire. Current flow in the middle of the wire will be about the same per unit of cross sectional area as current flow will be near the outside of the wire. Let's switch our DC for some AC. AC (alternating current) will flow in one direction for a while and then reverse direction to flow the other way for a while. Such is AC. And AC will cause current flow that uses all the available cross sectional area of the wire just as DC does, but only at low frequency. At higher and higher frequencies, current flow in the wire will shift away from the center and be more concentrated near the surface of the conductor. Near the skin of the conductor. AC of higher frequencies will promote current flow by skin effect, and that is the effect of frequency in AC current flow.
What size wire for 250 v AC?
Wire size is not dependent on voltage - it is dependent on current. Please restate your question and provide the expected branch current.
What is generated when a permanent magnet is moved in front of a coiled wire and the magnet's magnetic field pushes and pulls electrons in the coiled wire?
an AC, or alternating current
Why does alternating current AC needs thick wire as compare to direct current DC?
The thickness of the wire isn't related to the power being AC or DC; it's related to the amount of power in the circuit. If you are commenting on the wiring in your house you may notice that it's a larger gauge wire but the wire that goes to your lamp is not.
How do you make current?
Move the wire through a magnetic field
What does voltage cause?
The ability of current to move through a wire.
Why you use ac for transmission?
AC is used for transmission because AC can be stepped up in voltage with a transformer, and then stepped back down at the destination. Since power is voltage times current, a higher voltage requires a smaller current to achieve the same power. Since the current carrying capacity of wires is based on wire size, a smaller wire size can be used to transmit the lower current.
Is there a way to test the ac wires?
With a test light. They lightly pierce the wire & will light up when/if you have current. (Hot wire to compressor for example)
