Science Vocab
Magnetism Vocab
Terms
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- Magnetism
- A property of some materials in which there is a force of repulsion or attraction between certain like and unlike poles
- Electromagnet
- Strong temporary magnet made by inserting an iron core into a wire coil and passing an electric current through the coil
- Magnetic Pole
- The 2 ends of a piece of magnetic material where the magnetic forces are the strongest, labeled North _______(N) and South _________(S)
- Alternating Current
- Electric current that reverses its direction in a regular pattern- The 60-hz ______ in our homes changes direction 120 times each second
- Magnetic Field
- The region around a magnet where magnetic forces act
- Superconductor
- A supercooled material that has no electrical resistance; a current can flow indeinitely through a ____ without losing energy
- Direct Current
- Electrical current that flows in only one direction through a wire
- Voltmeter
- A galvanometer that measures potential differences in volts and is placed in parallel across a part of the circuit
- Transformer
- A device that can increase or decrease the voltage of an alternating current
- Electromagnetic Induction
- Process by which electrical current is induced in a wire when it is moved through a magnetic field
- Ammeter
- A galvanometer that measures electrical current passing through in ampheres' connected in series with the circuit
- Generator
- A device that uses electromagnetic induction to induce electrical current by rotating loops of wire though a magnetic field
- Electricmotor
- A device that contains a rotating electromagnet that changes electrical energy to mechanical energy
- Magnetic Domain
- Groups of atoms with aligned magnetic poles