Motor capacitors AC induction motors use a rotating magnetic field to…
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Capacitors in series Like other electrical elements, capacitors serve…
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The Effect of Phase We saw in the previous page that the voltage…
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Metal Film Resistors Metal film resistors have a thin metal layer as…
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Impedance and reactance An element in a DC circuit can be described…
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What is a Potentiometer? A potentiometer is a manually adjustable…
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What are mica capacitors? Mica is a group of natural minerals. Silver…
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What Is Ohm’s Law? Ohm’s law states that the electrical…
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We already know that purely reactive components (or purely reactive…
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Resistance Changes with Temperature The temperature coefficient of…
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What is capacitance? Electric capacitance is the ability of a…
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In a previous page, we discussed phasors, but we didn’t explore…
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Standard Resistor Values In 1952, the IEC (International…
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What are electrolytic capacitors? An electrolytic capacitor is a type…
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What are supercapacitors? Supercapacitors are electronic devices which…
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Different materials react to voltage in different ways. If a material…
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What is a Rheostat? A rheostat is a variable resistor which is used to…
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What is inductance? Electric inductance is a property of all…
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Definition Shunt Resistor A shunt resistor is used to measure electric…
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What is a Variable Resistor? A variable resistor is a resistor of…
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What is a Blower Resistor? Blower resistors are resistors which are…
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