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Electricty/Magnetism
| Question | Answer |
|---|---|
| electric force | The attractive or repulsive interaction between any two charged objects |
| Coulomb's law | a law stating that like charges repel and opposite charges attract, with a force proportional to the product of the charges and inversely proportional to the square of the distance between them. |
| electric field | This surrounds every electric charge |
| electric field lines | point in the direction that a positive charge would move when in the presence of an electric field |
| electricity | the movement of electrons |
| electrical conductor | something that conducts electricity well |
| electrical insulator | Materials that can not conduct electricity |
| semiconductor | Have few electrons with which to conduct electricity |
| superconducter | Very conductive materials whose the resistivity abruptly decreases to zero as the temperature |
| static electricity | a stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair. |
| friction | the resistance that one surface or object encounters when moving over another. |
| induction | a process in which a conductor is put in a particular position and magnetic field keeps varying or magnetic field is stationary and a conductor is moving. |
| 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 electrons through a complete circuit of conductors. |
| current | the flow rate of electrons through the circuit |
| resistance | is the measure of how difficult it is to move electrons through a circuit |
| voltage | is the force that moves electrons through a circuit measured in volts. |
| ampere | The unit current is measured in |
| coulomb | the SI unit of electric charge, equal to the quantity of electricity conveyed in one second by a current of one ampere. |
| pontential difference | the difference of electrical potential between two points. |
| volt | The unit voltage is measured in. |
| ohm's law | Resistance is equal to the voltage divided by current. |
| ohms | Resistance units |
| resistivity | the measure of how difficult it is for electricity to travel through a material. |
| circuit | a roughly circular line, route, or movement that starts and finishes at the same place. |
| series circuit | a path along which the whole current flows through each component |
| surge protecter | a device that prevents an electrical surge from damaging electronic equipment. |
| circuit diagram | a simplified conventional graphical representation of an electrical circuit. |
| switch | responds to an external force to mechanically change an electric signal. Switches are used to turn electric circuits on and off and to switch electric circuits. |
| fuse | a safety device that protects electrical circuits from the effects of excessive currents. |
| parallel circuit | comprises branches so that the current divides and only part of it flows through any branch. |
| circuit breaker | an automatic device for stopping the flow of current in an electric circuit as a safety measure. |
| bar magnet | a magnet in the shape of a bar with poles at its ends. |
| de-magnetize | to remove magnetic properties from something |
| magnetic field | a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials |
| magnetite | It is the most magnetic of all the naturally occurring minerals on Earth. |
| magnetic field lines | imaginary lines along which North Magnetic Pole would move |
| compass | an instrument containing a magnetized pointer which shows the direction of magnetic north and bearings from it. |
| lodestone | a piece of magnetite or other naturally magnetized mineral, able to be used as a magnet. |
| electromagnetic force | When a conductor is placed in a magnetic field and current flows in the conductor, the magnetic field and the current interact each other to produce force. |
| electromagnet | a type of magnet in which the magnetic field is produced by an electric current. |
| alternating current | a type of electrical current, in which the direction of the flow of electrons switches back and forth at regular intervals or cycles. |
| direct current | an electric current that is uni-directional, so the flow of charge is always in the same direction |
Created by:
codydatkid
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