Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
Normal Size Small Size show me how
Vocabulary
| Question | Answer |
|---|---|
| Electrostatic force | a fundamental, non-contact force of attraction or repulsion between stationary electric charges |
| Coulomb’s law | calculates the strength of the electric force (attraction or repulsion) between two charged particles |
| Electric field | an invisible region of influence surrounding a charged object (like a proton or electron) where other charges experience a force |
| Electric field lines point in the direction that . . . | a positive test charge would accelerate or feel a force if placed in that field |
| electricity | the flow of tiny charged particles called electrons through a material, usually a metal wire |
| conductor | a material that allows electricity or heat to flow through it easily, typically featuring low resistance and free-moving electrons |
| examples of conductors | copper, aluminum, gold, silver, and iron |
| insulator | a material that resists the flow of heat or electric current because its electrons are tightly bound and cannot move freely |
| examples of insulators | rubber, plastic, glass, wood, and dry air. |
| resistivity | an intrinsic material property measuring how strongly a substance opposes electric current flow |
| semiconductors | a material, typically silicon, with electrical conductivity between a conductor (like copper) and an insulator (like glass) |
| superconductors | materials that conduct electricity with zero resistance and expel magnetic fields when cooled below a specific "critical temperature" |
| critical temperature | the highest temperature at which a substance can exist as a liquid, no matter how much pressure is applied |
| Static electricity | the buildup of electric charge on the surface of objects, often caused by friction (rubbing) between materials |
| friction | a contact force that opposes the motion or attempted motion between two surfaces |
| induction | refers to several distinct processes: magnetic, electrical, logical, and organizational. |
| conduction | the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material. |
| current electricity | the flow of electricity in an electronic circuit, and to the amount of electricity flowing through a circuit |
| current | the flow of electric charge, usually electrons, through a conductor in a circuit, measured in Amperes |
| amperes | the SI base unit of electrical current. |
| resistance (R) | is the measure of opposition to electric current flow in a circuit, measured in Ohms |
| voltage (V) | the SI unit for electrical potential, potential difference, and electromotive force (EMF), |
| Ohm’s Law states that . . . | the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) |
| Formula for Ohm’s Law | V = I x R |
| circuit | a closed-loop path that allows electricity to flow from a source |
| batteries | a device consisting of one or more electrochemical cells that converts stored chemical energy into electrical energy, providing a source of direct current (DC) power |
| loads | any device or component in a circuit that consumes electricity and converts it into another form of energy, such as light, heat, or motion |
| Simple series circuit | an electrical circuit where all components are connected end-to-end in a single, continuous loop |
| Circuit diagram | graphical representation of an electrical circuit using standardized symbols to represent components and lines for connections |
| Formula for total resistance in series circuit | R(total) = R1 + R2 + R3 + ... |
| How does a switch work? | mechanically opening or closing a physical gap in a circuit to control the flow of electricity |
| Parallel circuit | connects components across the same two nodes, creating multiple independent paths for current to flow |
| Formula for total resistance in parallel circuit | 1/Rt = 1/R1 + 1/R2 + 1/R3 +... |
| magnet | deeply interconnected physical phenomena where moving electric charges |
| Magnetic field | an invisible vector field surrounding magnets, electric currents, or moving electric charges that exerts magnetic force on other magnetic materials or moving charges |
| Magnetic field lines always point . . . | from the North pole to the South pole outside a magnet |
| compass | a tool to detect electromagnetic fields |
| Bar magnet | a rectangular, typically permanent magnet made of ferromagnetic materials like iron, steel, or alloys |
| What happens when you break a magnet? | two or more smaller, fully functional magnets, each possessing its own North and South pole |
| Ways to de-magnetize a magnet | applying heat, physical shock, or an opposing magnetic field |
| electromagnet | a soft metal core made into a magnet by the passage of electric current through a coil surrounding it. |
| Parts of an electromagnet | a conductive wire (usually insulated copper) wound into a coil or solenoid, a ferromagnetic core |
| Simple (or electric) motor | A simple DC motor, often built for science projects, uses a battery, wire coil |
| Horseshoe magnet | a U-shaped, permanent magnet—often made of Alnico |
| armature | the core, current-carrying component in an electric motor or generator that interacts with a magnetic field to convert energy, |
| rotor | the rotating component of an electric motor, generator, or alternator |
| stator | the stationary outer component of an electromagnetic circuit in motors and generators |
| Electric generator | a device that converts mechanical energy into electrical energy for use in an external circuit |
| Alternating current (AC) | a type of electrical current where the magnitude and direction of charge flow reverse periodically, typically following a sinusoidal waveform |
| Direct current (DC) | the unidirectional flow of electric charge, where electrons move steadily in one direction, from negative to positive terminals |
Created by:
user-1973316