A difference of potential (which is measured in Volts) is needed to make current flow.
Yes, in order to induce a current in a conductor, there must be a change in the magnetic field interacting with the conductor. This change can occur through movement of either the conductor or the magnetic field itself, in accordance with Faraday's law of electromagnetic induction.
Salt must be mixed with water to make salt a good conductor.
The energy carried by an electric current depends on a conductor in order to flow. an Insulator disrupts the flow
Mass
In order for charge to flow, there must be a potential difference present across a conductor. This difference in electric potential creates an electric field that drives the movement of charge through the material.
Electricity travels through a conductor at nearly the speed of light, which is approximately 186,000 miles per second. However, the movement of electrons in a conductor is much slower, typically on the order of millimeters per second.
In order to change an electric current, you must first change the conductor, doing so will change the flow of atoms which will change the electrical discharge.
A conductor, a voltage source, and a ground. Have a more specific question?
The wire is not the problem. Electric current has no trouble going through the wire. But in order for a current to flow, there must be a complete conducting path from one side of the power supply to the other side, with no gaps in the path where there's no conductor. A broken wire has gaps in it where the only material in the gap is some other material, like rubber, water, or air. Thoise gaps are the problem, because any of those materials is a poor conductor, through which electricity cannot go.
A neutral is an active conductor in the circuit. It is grounded at the source but that's for another discussion. The ground exists to ensure the proper operation of over current devices like fuses and breakers in the event of a fault.
An electrical current will cause an electromagnet to energise.
No, a current cannot flow in a wire with a free end because there is no complete circuit for the current to flow through. In order for current to flow, there must be a closed loop circuit for the electricity to circulate through.