Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Electricity & Magnet

⚡ Electricity & Magnetism⚡

TermDefinition
Electrostatic force The force of attraction or repulsion between electric charges.
Coulomb’s Law (3 parts) The force between two charges is proportional to their charge product, inversely proportional to the square of the distance between them, and acts along the line joining them.
Electric field The region around a charged object where another charge experiences a force.
Electric field lines point in the direction that… A positive test charge would move (away from positive, toward negative).
Electricity The presence and flow of electric charge.
Conductor A material that allows electric charges to move easily.
Examples of conductors Copper, aluminum, silver, gold, iron, saltwater.
Insulator A material that does not allow electric charges to move easily
Examples of insulators Rubber, plastic, glass, wood, air.
Resistivity A measure of how strongly a material resists electric current.
Semiconductors Materials with conductivity between conductors and insulators.
Superconductors Materials with zero electrical resistance at very low temperatures
Critical temperature The temperature below which a material becomes a superconductor.
Static electricity The buildup of electric charges on an object’s surface.
Friction Charging by rubbing materials together.
Induction Charging without contact by rearranging charges.
Conduction Charging by direct contact.
Current Electricity The continuous flow of electric charge.
Current The rate of flow of electric charge.
Amperes Unit of current (1 amp = 1 coulomb per second).
Resistance Opposition to current flow.
Voltage The electric potential difference that pushes charges.
Ohm’s Law states that Current is directly proportional to voltage and inversely proportional to resistance (V = IR).
Formula for Ohm’s Law V = IR
Circuit A closed path for current to flow.
Batteries Devices that convert chemical energy into electrical energy.
Loads Devices that use electrical energy (bulbs, motors, resistors).
Simple series circuit A circuit with one path for current.
Circuit diagram A drawing using symbols to represent a circuit.
Total resistance (series) Rₜ = R₁ + R₂ + R₃ + …
How does a switch work? It opens or closes a circuit to stop or allow current.
Parallel circuit A circuit with more than one path for current.
Total resistance (parallel) 1/Rₜ = 1/R₁ + 1/R₂ + 1/R₃ + …
Magnet An object that produces a magnetic field and attracts magnetic materials.
Magnetic field The region where magnetic forces act.
Magnetic field lines always point From north to south.
Compass A device that aligns with Earth’s magnetic field.
Bar Magnet A rectangular magnet with a north and south pole.
What happens when you break a magnet? Each piece becomes a smaller magnet with its own north and south poles.
Ways to demagnetize a magnet Heating, hitting, or using an alternating magnetic field.
Electromagnet A magnet made by running current through a coil of wire.
Parts of an Electromagnet Power source, coil of wire, iron core.
Simple (Electric) Motor Converts electrical energy into mechanical energy.
Horseshoe Magnet U-shaped magnet with strong field between poles.
Armature The rotating coil in a motor.
Rotor The rotating part of a motor.
Stator The stationary part of a motor.
Electric generator Converts mechanical energy into electrical energy.
Alternating Current Current that changes direction periodically.
Direct Current Current that flows in one direction.
Created by: Fayth Williams
Popular Physical Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards