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Electric & magnetism
| Question | Answer |
|---|---|
| Electric force | which is expressed mathematically in the electrostatic force equation. The important points to remember are charged particle exert forces like repels opposites attract |
| Coulomb's law | charged particle exert forces like repels opposites attract |
| electric field | surrounds every charge. |
| electric field lines | is the point in the direction that a positive charge would move when in the presence of a electric flied |
| electricity | involves the movement of electrons results when electrons flow through a material |
| electrical conducor | when electricity happens the materiel is referred to since it can conduct electricity |
| electrical insulator | materiel that cant conduct electricity |
| semiconductor | are the third group of materials these materiel have few electron s |
| superconductor | are conductive materiel whose the resistivity abruptly decreases to zero |
| static electricity | occurs as a result of excess positive or negative charges on a objects surface rub off |
| friction | is where a object surface and a other objects surface come into contact with each other surfaces and causes them to rub against each cause them to have a hard time to move when you rub a wheel against rock or grass |
| induction | is where a charged object is brought near a insulator but not touching it at all |
| conduction | is where a charged objects touches a neutral object |
| current electricity | is the flow or electrons |
| current | the flow of a given thing |
| resistance | how much voltage can it resis |
| voltage | electricy |
| ampere | the measurement of voltage |
| coulomb | electrical charge |
| potential difference | the estimated differences |
| volt | V is the force that moves electrons through a circuit and is measured in volts |
| ohm's law | stats that the resistance is equal to voltage divided by the current. |
| ohms | Equation where resistance has units of ohms |
| resistivity | is the measure of how difficult it is to move electrons through a circuit |
| circuit | the path through which the electricity is conducted is a |
| series circuit | all current is the same through each part or load |
| surge protector | passes the electrical current along the outlet to number of the devices plugged into the power strip |
| circuit diagram | the three resistors represent the resistance provided by each light bulb |
| switch | may be used to open and close the circuit |
| fuse | a combined wire box to let energy flow |
| parallel circuit | all of the current flows through each part of the circuit. In a parallel circuit the current is divided into separate paths. |
| circuit breaker | interrupt current flow after protective relays detect a fault. |
| bar magnet | a Bar magnet is a man-made magnet, commonly used to illustrate the properties of magnetism |
| demagnetize | remove is magnetic quality |
| magnetic field | consisting of invisible lines of force around the magnets south and north |
| magnetite | natural magnet |
| magnetic field lines | the invisible lines of a magnetic fields is this |
| compass | contains a small magnet thats mounted on a pivot |
| lodestone | a ancient compass |
| electromagnetic force | the electrical part of this force is the responsibility of this is the electrical charge it has |
| electromagnet | is a device that becomes magnetic when electricity goes trough it |
| alternating current | every times the coil moves from north to south pole it is called |
| direct current | current made by battier |
Created by:
MDW