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16 Cards in this Set
- Front
- Back
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Who discovered electromagnetism |
Hans Christian Oersted |
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A current carrying wire is also a? |
Magnet |
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3 Factors that affect electromagnetism |
1. Iron Core 2. Number of turns 3. Voltage source |
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The larger the iron core |
The stronger the magnetism |
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The larger the number of turns |
The stronger the magnetism |
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The higher the voltage source |
The stronger the magnetism |
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Formula of force in electromagnetism |
F=B I L Where B = magnetic field I = current L = length |
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Formula of current |
I = V/R |
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Unit for magnetic field |
T (tesla) |
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Unit for magnetic flux |
Wb (weber) |
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Formula of magnetic flux |
Magnetic flux = B x A |
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Unit for magnetic flux |
T.m² = 1 Wb |
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Formula of magnetic field when in a long conductor |
B = Mo I/2πr Where r = distance |
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Formula of magnetic field when in a solenoids |
B = Mo N I Where N = no. Of turns |
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Formula of magnetic field when in a toroid |
B = Mo N I/2πr Where r = distance N= no. Of turns |
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Value of Mo |
4π x 10 ^(-7) |
