Alternating current: The flow of electric charge periodically reverses direction. In direct current, the flow of electric charge is only in one direction.
Ampere:
The SI unit of electric current. A flow of one
coulomb of charge per second is one ampere.
Diode: A semiconductor device with two terminals, typically allowing the flow of current in one direction only.
Direct current: An electric current flowing in one direction only.
Electric current: The
flow of electric charge; measured in amperes
Electric power: the
rate at which electrical energy is converted into another form, such as light,
heat, or mechanical energy
electric resistance: The
resistance of a material to the flow of electric current through it
Ohm: The
ohm is the SI derived unit of electrical resistance.
Ohm's Law: The law stating that the direct current flowing in a conductor is directly proportional to the potential difference between its ends. It is usually formulated as V = IR.
Potential difference: The amount of energy per unit charge needed to move a charged particle from a reference point to a designated point in a static electric field, voltage.
Voltage source: A device, such as a dry cell or generator, That provides a potential differences.