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Why is a transformer called kVA?
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Why motor are rated as KW while transformer rated in kVA?

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There are a Transformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?

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Why hysteresis and eddy current losses occur in a transformer?

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State why a transformer always has an efficiency of more than 90%.

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Explain the polarity test of a transformer. Why is it necessary?

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Why power factor of the transformer under no load is very low?

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Why Low Voltage winding near core of the Transformer?

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Why energy conservation technique should be adopted in transformer even though its efficiency is mostly more than 90%.

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Why transformer is not used in half wave rectifier?

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Why transformer works on AC rather than DC?
Answer : A transformer works on **AC (Alternating Current)** rather than DC (Direct Current) because of the way it relies on changing magnetic fields to transfer energy between its coils. Here's how it works: 1 ... *. With **DC**, the magnetic field doesn't change, and the transformer can't transfer power....

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