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16 Cards in this Set
- Front
- Back
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Magnetic flux lines |
Cannot be insulated |
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Like magnetic poles |
Repel |
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A permeable material means that |
Flux lines concentrate in it |
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Material with the lowest permeability is |
Aluminium |
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3 characteristics of the direction of magnetic flux lines are |
1. North Pole and South Pole 2. Shortest path 3. Repel one another when they have the same direction |
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A permanent magnet loses magnetic strength when |
Exposed to shock |
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3 factors that affect the strength of an electromagnet are |
1. Number of turns of wires 2. Voltage applied to the coil 3. Type of core material |
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An electromagnetic device that draws an iron core to its centre is called |
A solenoid |
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The right hand rule for conductors determines the |
Direction of the magnetic flux lines around the conductor |
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When using the right hand rule for coils, the |
Thumb points to the North Pole |
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The magnetic principle used in electric motor operation is called ________ and states that _____________________. |
Electromagnet inductions A current carrying conductor within a magnetic field to an area of the weaker magnetic field |
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Voltage is generated in a conductor when a magnetic field |
Moves at An angle around a conductor |
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4 factors the determine the amount of voltage produced in a conductor |
1. Speed 2. Intersecting angle 3. Strength 4. Number of conductors |
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When current flowing in a coil of wire is stopped |
The surrounding magnetic field collapses |
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Self-induction can be stated as |
A voltage within the coil when current flow stops resulting in the magnetic field to collapse |
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Mutual induction occurs |
Between two coils or conductors |
