25 terms

# Electric circuits vocabulary MRS HAWTHORNE

#### Terms in this set (...)

ampere
a unit of electric current equal to a flow of one coulomb per second.
battery
a container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power.
charged
having an electric charge.
closed circuit
An electric circuit through which current can flow in an uninterrupted path.
conductor
a material or device that conducts or transmits heat, electricity, or sound, especially when regarded in terms of its capacity to do this.
coulomb
the SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere.
electric circuit
a path in which electrons from a voltage or current source flow.
electric current
a flow of electric charge.
electrically neutral
when the overall charge of the atom is zero.
electricity
a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.
insulator
a thing or substance used for insulation, in particular.
multimeter
an instrument designed to measure electric current, voltage, and usually resistance, typically over several ranges of value.
negative
(of a quantity) less than zero; to be subtracted from others or from zero.
ohm
the SI unit of electrical resistance, expressing the resistance in a circuit transmitting a current of one ampere when subjected to a potential difference of one volt.
Ohm's law
A law relating the voltage difference between two points, the electric current flowing between them, and the resistance of the path of the current. Mathematically, the law states that V = IR, where V is the voltage difference, I is the current in amperes, and R is the resistance in ohms.
open circuit
an electrical circuit that is not complete.
positive
(of a quantity) greater than zero.
potentiometer
an instrument for measuring an electromotive force by balancing it against the potential difference produced by passing a known current through a known variable resistance.
resistance
the ability not to be affected by something, especially adversely.
resistor
a device having a designed resistance to the passage of an electric current.
semiconductor
a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits.
static electricity
a stationary electric charge, typically produced by friction, that causes sparks or crackling or the attraction of dust or hair.
switch
a device for making and breaking the connection in an electric circuit.
volt
the SI unit of electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance.
voltage
an electromotive force or potential difference expressed in volts.