Electricity and electric circuits

41 terms

acetate

a type of plastic used in photographic film

ammeter

a meter that measures the flow of electrical current in amperes

amperes

the unit for measuring electrical current; the abbreviation is amp.

coulomb

a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second

current electricity

a flow of electric charge

energy

(physics) the capacity of a physical system to do work

force

a push or pull from an object

insulators

materials that prevent electric charges from flowing easily

joule

a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second

junction point

the location where a circuit divides into multiple poins or where multiple points combine

neutral

an object or substance that has no charge

potential difference

the difference in electrical charge between two points in a circuit expressed in volts

stored energy

power

(physics) the rate of doing work

power rating

Amount of energy that changes form in a machine each second; Wattage

proton

a particle with positive charge

static charge

Build up of electrons on an object

Van de Graaff generator

electrical device that produces a high voltage by building up a charge of static electricity

terminals

points which must be touched by electrons in order to make a complete circuit.

resistor

resists the flow of electrons

resistance

the opposition to the flow of electric charge

parallel circuit

a closed circuit in which the current divides into two or more paths before recombining to complete the circuit

Ohm's law

describes the mathematical relationship present in most circuits.

ohmmeter

a meter for measuring electrical resistance in ohms

ohm

a unit of electrical resistance equal to the resistance between two points on a conductor when a potential difference of one volt between them produces a current of one ampere

conductors

a substance that allows energy transfer

laws of static charge

1.)opposites attract, 2.) same repel, 3.( neutral attracts anything

kinetic energy

Energy created by movement

kilowatt-hour

the amount of kilowatts generated in an hour

electrodes

a metal strip that conducts electricity

electrochemical cells

a system changes chemical energy to electrical energy

electrical resistance

a material's opposition to the flow of electric current

electrical power

the product of voltage and current

electric potential energy

Energy a charge has due to its location in an electric field

any device that transforms electrical energy into other forms of energy, such as a light bulb, buzzer, heater, and motor (8.2)

electric force

the force between charged objects

electric current

a flow of electricity through a conductor

electric circuit

an electrical device that provides a path for electrical current to flow

charging by conduction

two objects touch and charge is transfered.

charging by induction

bringing a charged object near a neutral object in order to charge the neutral object

circuit diagram

A diagram with symbols that shows all of the components in a circuit and how they are connected.