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11 Cards in this Set
- Front
- Back
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What is the Function of autotransformer
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Regulate voltage to primary side
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What is the Construction of autotransformer.
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Single coil of insulated wire around a large iron core.
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Operation principle of Autotransformer.
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self induction.
Coil or winding serves as primary and secondary. Adjusted on secondary by contactor. Secondary to primary turns varies ratio of voltage imput and output |
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What is the Autotransformer law
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Voltage of two circuits is proportional to number of turns in a coil.
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Vs/ = Ns/
Vp Np |
autotransformer law
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What is a Rheostat
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Variable resistor for ac/dc
<mA> |
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Construction of rheostat
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Resistor coils and sliding tab
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Operation principle of a rheostat.
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Ohms law electrical energy to hear.
Rheostat varies voltage to primary transformer |
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Draw the symbol
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---[/]---
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What is a choke coil
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Electromagnet self induced AC.
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Components of a choke coil
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Coil with iron core inside
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