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19 Cards in this Set
- Front
- Back
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The invisible field around a magnet consisting of lines of force. |
magnetic field
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A device that converts electrical energy into mechanical energy.
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motor
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A magnet formed when a wire carrying electricity is wrapped around an iron or steel core.
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electromagnet
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A covering made from non-conducting material used to prevent short circuits or shock from electricity. |
insulation
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To push objects away from one another such as like poles of magnets or electromagnets.
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repelling
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Forces that develop from the movement of electric charges.
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electromagnetism
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One of the ends of a magnet or electromagnet.
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magnetic poles
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The capacity for doing work and overcoming resistance.
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energy
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The force field surrounding an electromagnet
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electromagnetic
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The two (2) ways to increase the strength of an electromagnet
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1) Add more coils
2) Add more batteries |
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In a buzzer: what part is considered the electromagnet?
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The 4D nail with a coil of insulation wire wound around it
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The best method for an electromagnet to have the most strength.
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Adding coils because it uses less energy and does not cause resistance in the wire
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A disadvantage of adding batteries in a series.
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batteries become hot and causing resistance in the wire (less energy can pass through the wire).
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When the compass is placed on the circuit and the circuit is completed, what do the results tell us? |
Compass shows an electromagnetic field in a wire with electricity passing through it?
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What is the purpose of the iron filings?
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Make the Magnetic Field Visible.
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In a buzzer the electromagnet attracts what other part to the nail?
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buzzer arm
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When the buzzer arm is pulled away from the metal angle- what happens to the circuit?
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The circuit is now open
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In an electromagnet after the circuit is open, what happens to the electromagnet and nail?
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The nail is no longer an electromagnet and is not attracted to the buzzer arm
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If the buzzer is not working, what areas on the project board might you want to check?
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1. The circuit is closed
2. All batteries’ poles are facing the same way. 3. All wires are connected to complete the circuit. |
