a closed path along which electrons that are powered by an energy source can flow
Voltaic Cell Definition
a source of energy that generates an electric current by chemical reactions involving two different metals or metal compounds separated by a conducting solutions
Battery Definition
a connection of two or more cells
Electrode Definition
one of two meta terminals in a cell or battery
Electrolyte Definition
a solution or paste that conducts a charge
Dry Cell Definition
a cell that contains an electrolyte made of a paste
Wet Cell Definition
a cell that contains a liquid electrolyte
Primary cell Definition
a cell that can be used only once
Secondary Cell Definition
a cell that can be recharged
Fuel Cell Definition
a cell that generates electricity through the chemical reactions of fuel that is stored outside the cell
Solar Cell Definition
a cell that converts sunlight into electrical energy
Terminal Definition
a position on a cell that must be connected to other components to form a circuit
Switch Definition
a control device that can complete or break the circuit to which it is connected
Open Circuit Definition
a circuit that contains a gap or break
Electric Current Definition
a measure of the number of charged particles that pass by a point in an electric circuit each second
Coulomb(C) Definition
the quantity of charge that is equal to the charge of 10 to the 18 electrons
Ampere(A) Definition
the unit of electric current, equivalent to one coulomb per second
Electrical resistance Definition
the property of a substance that hinders electric current and converts electrical energy to other forms of energy
Resistor Definition
a device used in an electric circuit to decrease the current through a component by a specific amount
Load Definition
a resistor or any other device that transforms electrical energy into heat, motion sound or light
Potential Difference( voltage) definition
the difference between the electrical potential energy per unit of charge at two points in a circuit
Volt Definition
the unit for potential difference; equivalent to on joule(J) per coulomb(C)
Circuit Diagram Definition
a diagram that uses standard symbols to represent the components in an electric circuit and their connections
Series circuit Definition
a circuit in which there is only one path along which electrons can flow
Parallel Circuit Definition
a circuit in which there is more than one path along which electrons can flow
Ohm's Law Definition
the ratio of potential difference to current is a constant called resistance
Ohm (Ω) Definition
the unit for resistance, equivalent to one volt per ampere
Superconductor Definition
a material through which electric charge can flow with no resistance