## electricity & magnetism test questions

##### Created by:

aoedwards  on March 25, 2010

##### Classes:

Edwards 8th Science

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# electricity & magnetism test questions

 Unlike magnetic & unlike electric poles (attract or repel)attract
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#### Definitions

Unlike magnetic & unlike electric poles (attract or repel) attract
Buildup of charges on an object is static electricity
Clothes in a dryer acquire static cling by (friction, induction, or conductio) friction
The loss of static electricity as electric charges move off an object is called static discharge
An electric current will always follow the path of least resistance
Formula for ohms law V= I x R
In a series circuit with 3 bulbs, adding another bulb will make all the bulbs dimmer
In a parallel circuit with three bulbs the current from each bulb has its own path
Material that allow current to flow freely conductor
Example of an insulator rubber
Device used to open and close an electric circuit switch
What happens if you break a magnet in half? each half will be a new magnet
The region around a magnet where the magnetic force is exerted magnetic field
Cluster of billions of atoms that have all the magnetic fields lined up magnetic domain
An example of a ferromagnetic field nickel
What do magnetic field around a bar magnet look like? they curve around the ends of the poles
Magnetic north and geographic north are the (same or not the same) not the same
Streams of electricity charged particles flowing at high speeds from the sun make the solar wind
Magnetism can be considered a physical or chemical property? physical
One part of a free swinging magnet always points to the earths magnetic pole
What causes a magnet to behave the way it does? the earths magnetic field
The earths strong magnetic field can make magnets
For magnets objects to be elevated and repel each other the poles of the magnets must be the same so they repel
Why does a compass point north? the magnetized compass needle algins itself withthe Earth's magnetic field
An example of a device that can conduct current and also be safe for a person to touch plastic for the insulator and metal for the conductor
The potential difference that causes the charges to move in a circuit is called voltage
Ohms Law Resistance= voltage divided by time
Which particle of an atom is responsible for a materials magnetic properties? electron
Ina magnetized material all or most of the magnetic domains are arranged in the same direction
Three ways charges can be transferred conduction, induction, and friction
To produce an electric current charges must flow continuously along a path
What two factors affect gravitational attraction between two objects? mass and distance
________ is determined by the force of gravity. Weight
As the distance between two objects increases, the gravitational pull between the objects decreases

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