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18 Cards in this Set
- Front
- Back
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When a magnetic field is formed around a conductor that has current flowing through it. |
Electromagnetism |
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Devices that all contain electromagnets |
Solenoids, Relays, and Motors |
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The unit for Inductance is |
Henrys |
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A coil that opposes any changes in the flow of current |
Inductor |
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the apparent resistance of an inductor in an AC circuit |
Inductive Reactance |
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What is the formula for total series Inductance? |
LT = L1 + L2 + L3 |
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A common inductor often found in fluorescent light fixtures. |
a ballast |
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what is the formula for total parallel inductive reactance? |
XLT = 1 / (1/XL1 + 1/XL2 + 1/XL3) |
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what is the name the energy stored in a capacitor? |
electrostatic charge |
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what are the types of capacitors? |
1) polarized/electrostatic 2) nonpolarized 3) variable |
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The unit for capacitance is |
Farads |
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An effect a capacitor has on a DC circuit is that |
it will charge to a voltage equal to the source voltage. |
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The apparent resistance in a capacitor in an AC circuit is |
Capacitive reactance |
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What is the total series capacitive reactance formula? |
XCT = XC1 + XC2 + XC3 |
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A time-delaly relay using an RC timing circuit is also known as a |
Solid State, time-delay relay |
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The role of a capacitor in a DC power supply is to |
filter out unwanted AC voltage |
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The formula for total parallel capacitance |
CT = C1 + C2 + C3 |
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This only affects a DC circuit when it is turned on, turned off, or the load changes |
Inductance |
