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Magnets&Electricity
Term | Definition |
---|---|
electric current | flow of electricity |
circuit | path made for an electric current |
battery | common energy source that converts chemical energy to electrical energy |
conductor | material that an electric current can pass through easily |
insulator | material that an electric current cannot pass through easily |
series circuit | circuit with one path for current to take |
parallel cicuit | circuit with more than one path for current to take |
magnetic pole | area on a magnet where its magnetic field is strongest |
magnetic field | space around a magnet where the force of the magnet acts |
electromagnet | current-carrying coil of wire wrapped around a core |
Like poles of a magnet will ________ | repel |
Wher is a bar magnet's strongest pull? | the poles |
magnets will attract if the poles are _____ | opposites |
Electromagnets in motors are used to cause ___ | motion |
Name three ways to strengthen an electromagnet | 1. add coils 2. turn off or on 3. increase or decrease amount of current |
How does a compass work? | the magnet in the compass is attracted to Earth's magnetic force |
magnetism | the force of attraction or repulsion from a magnet |
To attract means to ___ | pull towards |
To repel means to ___ | push away |
generator | converts kinetic energy to electrical energy |
electric motor | converts electrical energy to kinetic energy |
turbine | wheel or blades that rotate to turn a generator |
switch | controls the flow of electricity in a circuit |
open circuit | electricity cannot flow |