Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

23 Cards in this Set

  • Front
  • Back
quantity, measured in ohms, that represents how hard it is to push electrons through a material. High resistance wires are used when electron energy is to be converted into heat energy
electrical resistance
an excess of deficit of electrons on an object
electrical charge
source of energy producing an alternating current i an electric circuit through the use of electromagnetic induction
electric generator
collection of lined that map out the direction that compass needles would point in the vicinity of a magnet
magnetic field
a unit of measurement for the amount of current (number of charges) flowing in a wire or elsewhere per unit of time
ampere (amp)
two opposite ends of a magnet named north an south that repel like a magnetic pole and attract an unlike magnetic pole
a type of electric current, commonly used in household appliances and cars, in which charges alternate their direction of motion
alternating current
a dficiency of electrons on an object
positive charge
device that operates by supplying current to an electromagnet to make the magnet move and generate mechanical power. The motor employs permanent magnets and rotating loops pf wire inside the poles of this magnet
electric motor
an excess of electrons on an object
negative charge
term used to refer to the unified nature of electricity and magnetism
electromagnetic force
the force that would be exerted on a postive charged object. every charged surrounded by an electric field
electric field
the pressure by the energy source in a circuit, measured in volts
materials that exert a magnetic field on other objects
unbroken path of material that carries electricity and consists of three parts: a source of energy, a closed path, and a device to use the energy
electric circuit
an empirically derived rule that states that the magnitude of electrostatic force between any two objects, and inversely proportional to the square of the distance between them
Coulomb's law
a device that converts stored chemicals energy into kinetic enrgy of charged particles running through an outside wire
electric current
a flow od charged particles measured in ampheres
electric current
device that produces a magnetic field from a moving electrical charge
the force exerted by magnets on each other
magnetic fields
type of electric current in which the electrons flow in one direction only, for example, in the chemical reaction of a battery
direct current
a force, more powerful than gravity, that moves objects both toward and away from each other depending upon the charge
a phenomenon caused by the transfer of electrical charge between objects. often observed as lightning or as sparks produced when walking across a wool rug on a dry, cold day
static electricity