Potential difference.
Like the plus and minus on batteries...
yes it need ion to flow
To measure current you will need an ammeter.
because thyrister doesn't allow the current to flow unless there is a current flow into the gate. this current must be dc, and the rating of this current depends on the type of thyrister.
One disadvantage of a insulator is that it will not let current flow if you need it to. By the same token one advantage of an insulator is that it will not let current flow if it tries to.
A Counter-current flow has more advantages as comapared to a co-current flow.
A current flow restrictor is a diode.
Conducting materials readily give and receive electrons from one atom to another. Electric current is actually the flow of electrons, so if it's difficult for the electrons to move, there will little or no current flow.
No it is not possible to flow current wireless.
Reverse current.
The higher the resistance the lower the current flow. It restricts the flow of electrical current. The resistance will not depend upon the current. The current flow will depend on the resistance.
A rectifier is used to convert alternating current (AC) to direct current (DC). The rectifier allows current flow in one direction only, converting the back-and-forth flow of AC to a constant flow in DC circuits.
The direction of current due to flow of electrons is opposite to the direction of conventional current. This is because electrons have a negative charge, so when they flow in a wire, they are actually moving in the opposite direction to the current flow defined by convention.