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Why is a transformer used?
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Why transformer is not used in half wave rectifier?

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Which transformer is used in a half-wave rectifier?

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Select insulating materials for following parts: (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.

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Which transformer is used in half wave rectifier?
Answer : In a half-wave rectifier, a **single-phase transformer** is typically used. The transformer is used to step up or step down the AC voltage to the desired level before it is rectified. ... of the AC waveform is used, and the transformer ensures the correct voltage is available for rectification....

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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 motor are rated as KW while transformer rated in kVA?

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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 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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Why is a zener diode used in reverse bias?
Answer : A Zener diode is used in reverse bias because that's how it operates to regulate voltage. Normally, diodes allow current to flow in only one direction (forward bias), but a Zener diode is designed ... that's when it can regulate voltage or protect circuits by limiting the voltage to a safe level....

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