-
Electric circuit
A closed path along which electrons that are powered by an energy source can flow.
eg. battery, generator, motor
-
Voltaic Cell
A source of energy that generates an electric current by chemical reactions involving two different metals or metal compounds separated by a solution that is a conductor.
-
Battery
A connection of 2 or more cells
1 cell = 1.5 V
-
Electrode
One of two metal terminals in a cell
-
Electrolyte
a liquid or gel which contains ions and can be decomposed by electrolysis, e.g. that present in a battery.
-
Dry cell
an electric cell in which the electrolyte is absorbed in a solid to form a paste, preventing spillage.
-
Wet cell
a primary electric cell in which the electrolyte is a liquid.
-
Primary cell
an electric cell that produces current by an irreversible chemical reaction.
-
Secondary cell
storage cell; a cell that can be recharged
-
Fuel cell
a cell producing an electric current direct from a chemical reaction.
-
Solar cell
a device converting solar radiation into electricity.
-
Terminal
a point of connection for closing an electric circuit.
-
Switch
a device for making and breaking the connection in an electric circuit.
-
Open circuit
consisting of or containing an open electric circuit.
-
Electric current
a flow of electricity through a conductor
-
Coulomb
the SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere.
-
Ampere
a unit of electric current equal to a flow of one coulomb per second.
-
Electrical resistance
a material's opposition to the flow of electric current; measured in ohms
-
Resistor
a device having resistance to the passage of an electric current.
-
Load
A device or the resistance of a device to which power is delivered.
-
Potential difference (voltage)
the difference of electrical potential between two points.
-
Volt
the unit for potential difference equivalent to one joule
-
Circuit diagram
a simplified conventional graphical representation of an electrical circuit.
-
Series circuit
a circuit having its parts connected serially
-
Parallel circuit
a closed circuit in which the current divides into two or more paths before recombining to complete the circuit
-
Ohm’s law
a law stating that electric current is proportional to voltage and inversely proportional to resistance.
-
Ohm (Ω)
the SI unit of electrical resistance, transmitting a current of one ampere when subjected to a potential difference of one volt.
-
Superconductor
A conductor with no electrical resistance
e.g. Mercury
-
Non-ohmic
resistors have changing ratios, and are defined by their instantaneous resistance
-
Loads in Series
Loads that are in a series connection
-
Loads in Parallel
Loads that are in a parallel connection
|
|
