Creation of electric field inside a conductor My book says that as soon as the two ends of a conducting wire touches the two terminals of a battery, it generates an electric field inside the conductor. Why?
 A: There is an electric field between the battery terminals even before you connect the wire. For example, positive ions in the air will be attracted towards the battery's negative terminal (and repelled by the battery's positive terminal). Vice versa for negative ions. The mean magnitude of the electric field strength is given by $$E=\frac{\text{pd between terminals}}{\text{distance between terminals}}.$$
When you connect a wire across the terminals, there will be some redistribution of free electrons in the wire, resulting in an electric field in the wire, parallel to the axis of the wire, constant in magnitude all along it and directed from the positive terminal of the battery towards the negative. The magnitude of the field strength will be$$E=\frac{\text{pd between ends of wire}}{\text{length of wire}}.$$Free electrons will flow through the wire as a result.
The initial redistribution of free electrons, rendering the field in the wire as described above, will be almost instantaneous, but not quite, as electric field disturbances travel at approximately the speed of light.
A: Think of it this way, one side of the battery has a higher pressure and the other has a lower pressure as there is no such thing as a negative anywhere in our universe. when they are connected the higher pressure flows to the lower pressure as this is with all our universe. the wire will then create a magnetic field that surrounds the wire which in turn is surrounded by an electric field at 90 degrees from the magnetic field on the outside of the wire. at no time is an electric field created inside of a wire as this is an external force and the fact that a copper wire is a dielectric reflector so it is quite obvious that the Author is fooling himself and it's students.
an electric field from the chemically induced battery begat current flow and as such will create and electric and magnetic field around the wire.
