Anode	The positively charged electrode by which the electrons leave a device
Battery	A  container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.
Bobbin	A spoollike form around which a coil of insulated wire is wound toprovide an inductance
Capacitor	A device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator
Cathode	The negatively charged electrode by which electrons enter an electrical device.
Cell	A device that generates electrical energy from chemical energy
Circuit	The complete path of an electric current,including the generating apparatus, intervening resistors, orcapacitors.
Current	The time rate of flow of electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit time
Diode bridge	Is an arrangement of four (or more) diodes in a bridge circuit configuration that provides the same polarity of output for either polarity of input.
Electric Field	A vector quantity from which is determined the magnitude and directionof the force (electric force) on a charged particle due to the presenceof other charged particles, accelerated charged particles, or time-varying currents.
Electrode	A conductor, not necessarily metallic, through which a current enters orleaves a nonmetallic medium
Energy	The capacity for do a activity
Galvanometer	An instrument for detecting the existence of small electric currents and determining their strength.
Hardware	Are all the physical components of a device
Electromagnet	A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
Node	Any point on a circuit where two or more circuit elements meet.
Parallel Port	A connector for a device that sends or receives several bits of data simultaneously by using more than one wire.
Resistance	A property of a conductor by virtue ofwhich the passage of current is opposed
Software	The programs and other operating information used by a computer
Solution	A liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).
Storage battery	A battery (or cell) used for storing electrical energy.
Transformer	An apparatus for reducing or increasing the voltage of an alternating current.
Volt	The standard unit of potential difference and electromotive force in the International System of Units (SI)
Voltage	An electromotive force or potential difference expressed in volts.
Voltmeter	An instrument for measuring electric potential in volts.