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Electricity & Magnet

Electricity and magnetism flash cards

TermDefinition
Electrostatic force Its described by coulombs law; its expressed mathematically
Coulomb’s law (give all 3 parts) Charged particles exert forces on each other - like charges repel, opposites attract - the greater the distance between charges, the less force they will exert on each other
Electric field The surrounding of every electric charge
Electric field lines point in the direction that . . . A positive charge would move when
electricity The flow of electrons through a material
conductor Can conduct electricity
examples of conductors Copper, steel, zinc
insulator Materials that cannot conduct electricity
examples of insulators Wood, plastic, rubber
resistivity Measures how difficult electricity can travel through an object
semiconductors Have few electrons but good conductors if enough energy is provided
superconductors Materials whose the resistivity abruptly decreases to zero at the temperature decreases below critical value
critical temperature Depends on chemical composition, pressure, and structure of a material
Static electricity Occurs as a result of excess positive or negative charges on a particles surface
friction Rubbing two objects together, loose atoms rub off and transferred to another object
induction When static electricity is brought near a conductor
conduction When two objects are brought in contact, one neutral and one positive
current electricity Electrons flowing through a circuit like water through a pipe
current Flow rate of electrons
amperes Measurement of current
resistance (R) Measure of how difficult it is to move electrons through a circuit
voltage (V) Force that moves electrons through a circuit
Ohm’s Law states that . . . Resistance is equal to the voltage divided by the current
Created by: user-2023634
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