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basic electricity

TermDefinition
electricity the flow of
electrical energy through some conductive material
Direct An electric circuit with current flowing in one direction only is known as a ____ current.
Alternating A flow of electric charge that regularly reverses its direction is an ____ current
capacitor An electrical device used to store electrical charge.
load anything in a circuit that uses electricity
current A flow of electric charge.
fuse A safety device with a thin metal strip that will melt if too much current passes through a circuit
circuit A reusable safety switch that breaks the circuit when the current becomes too high is a ____ breaker
ampere (A) SI unit for electric current
conductor a material that easily allows the flow of electricity
insulators materials that prevent electric charges from flowing through them easily
battery a combination of two or more electrochemical cells in a series
A 3V battery If you connected two 1.5V cells in series what do you have?
series A circuit where there is a single path for the current to travel is known as a ___ circuit.
same the current in a series circuit is the throughout the circuit.
shared The use of energy in a series circuit with two bulbs will be between the components and they will both be dimmer than if there was one.
parallel A circuit where there is more than one path for the current to travel is known as a ___ circuit
split The current in a parallel circuit can _____ and re-joined in a parallel circuit
voltage The difference in electrical potential energy between two places in a circuit.
control Switches are used to ____ the flow of current by making or breaking the circuit.
Battery A battery consists of two or more cells
Cell A cell is required to push current around a circuit
Wires Transfers electrical energy from the battery to load and should always be drawn using straight lines
Switch A switch enables the current in a circuit to be turned on or off
Light bulb Will convert electrical energy into heat and light when current is flowing
Ammeter Measures electric current in amperes (A) and always connected after the batteries in series with the rest the resistors.
Voltmeter Measures potential difference in volts (V)
parallel The voltmeter must always be connected in ____ with the thing being measured
voltage = Amperage (I) x Resistance (R)
current I= V/R
resistance R=V/I
Watts Unit of power
power V x I
Ground An electrical connection to the earth where the potential energy of the electrons is Zero
drop a reduction of electrical energy by an electrical device as current passes through it is known as a voltage ____
battery the total of all the voltage drops across each resistor equals the total voltage across the ____
Ohm's units of resistance
Resistivity A material's opposition to the flow of electric current.
directly resistance to an electrical current is _________ proportional to the cross sectional area of the conductor (wire)
Reheostat an adjustable resistor that allows for manual control of the resistance in a circuit. (dimmer light switch)
semi-conductor material that can be made to behave as either a conductor or an insulator of electricity or heat.
Insulators materials that keeps energy such a electricity, heat or cold from easily transferring through.
increases resistivity _______ with temperature increases
Superconductivity a property of a material that has infinite conductivity at very low temperatures, so that charge flows through it without resistance
Ohm's Law V=IR
IR drop term for the product IR, which specifies the potential drop over a pure resistance R carrying a current
equivalent resistance for resistors in a series, is the sum of all the individual resistances
series Resistance in a __________ circuit is just the sum of each component
Created by: rufuspat
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