Resistance is determined by the resistivity of the material, divided by it's cross section and multiplied by it's length. And that doesn't change when the wire is coiled.
Resistance can be thought of in many ways. One way that may be useful here is to think of it as the amount of energy or power that something will generate when a certain amount of current flows through it. When the electrons go from atom to atom in the conduction band of a metal, they don't do so 100% freely. Some of the momentum of the electron goes to vibrating the atom, which is what heat essentially is in a solid material. And the more the tendency to generate heat in response to current flow, the higher the resistance. More energy gets absorbed by the current-carrying medium, whether that be a straight wire, a wire in a coil, a block of something, or any shape.
You may be confusing resistance with inductance:
The resistance of a wire is a measure of its opposition to a DC current flow.. The resistance is determined by the wire's length, its cross-sectioanal area, and the conductivity of the metal used. Its resistance isn't affected by the shape that it's formed into.
On the other hand, coiling a wire into a solenoid does change its inductance which is its opposition to a change in current flow with respect to time. The inductance of a solenoid coil is affected by the solenoid's radius, its length (of the solenoid, not the wire), and the number of turns.
it changes if you use AC (alternating current)! Because it changes it's direction it opposes a flow of other electrons in wire! This is called inductance!
However if you use DC (direct current) all the coiled wire will do is produce magnetic field! This way works electronic engine!
well, the resistance is the same
but
the inductive reactance will no longer be 0
so the overall impedence will be increased - at least in an AC circuit
Why do you think it would change? think about this and re ask the question about what is puzzling you. You think it should change because...?
why there is no change in resistance of the wire when the wire coiled into a solenoid? please explain
