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Question:

what is the defference between inductor & wire?

as we know ,the resistor of wire is called resistor but for inductor it is called induction why?

Answer:

The RESISTANCE of wire makes a resistor, the current running through a wire makes the wire an inductor. The inductor is usually a coiled wire when used for practical purposes.
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A resistor resists current. Plain enough what that means. An inductor is any conductor which, when the magnetic field around it changes, induces a current. This change in magnetic field may even be due to a change in the current through the conductor. For an example, look at what happens when you unplug an electric fan while it is running. The motor, which is an inductor, will cause a surge in current, resulting in a spark when the plug is pulled. If the fan is already off when you pull the plug, you will see a much smaller spark, if any at all.
A resistor opposes flow in current, so that's where it got it's name from. A inductor opposes change in current. The term induction was given, because an inductor works like this: A changing current will produce a changing magnetic flux inside the coil that forms the inductor, and that will induce an emf(like a voltage) in that same coil. From that, here is something that can be deduced: A resistance will be present as long as there is a current, either AC, or DC. An inductor will only work if the current is not constant - AC current only. Note that since most inductors are made of some sort of wire, they will have an internal resistance. EDIT. To Poppa: Inductors do not induce a current, but an emf. Of course an emf will most likely produce a current flow, but I think it's important to point that out. To AnotherHuman: The current flowing through a wire does not make the wire an inductor. Example, if you use constant DC current, you will not have an inductor

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