electricity & magnetism test questions
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34 terms
Terms | 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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