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Electricity part 3

QuestionAnswer
What is rectification? Rectification is the process of converting alternating current into direct current.
Why is rectification necessary? Most electronic devices require direct current to operate.
What device is used for rectification? A diode.
What is a diode? A device that allows current to flow in one direction only.
What is a semiconductor diode made from? P-type and N-type semiconductor materials.
What is a half-wave rectifier? A circuit that allows current to flow during only one half-cycle of AC.
What happens to the negative half-cycle in a half-wave rectifier? It is blocked by the diode.
What is a disadvantage of half-wave rectification? It produces a low and uneven DC output.
What is a full-wave rectifier? A circuit that converts both half-cycles of AC into DC.
How does a full-wave rectifier differ from a half-wave rectifier? It uses both halves of the AC signal.
What components are used in a full-wave rectifier? Four diodes arranged in a bridge or two diodes with a centre-tapped transformer.
What is a bridge rectifier? A full-wave rectifier using four diodes.
What is the advantage of a bridge rectifier? It produces a smoother and higher DC output.
What is ripple? The variation in DC voltage after rectification.
Why is the output after rectification not pure DC? Because the voltage still rises and falls.
What component is used to reduce ripple? A capacitor.
What is smoothing? The process of reducing ripple in rectified DC.
How does a capacitor smooth the output? It stores charge and releases it between cycles.
What type of current is obtained after rectification and smoothing? Steady direct current.
Why are rectifiers used in power supplies? To convert AC mains electricity to DC.
What happens if a diode is connected in reverse bias? It blocks current flow.
What happens if a diode is connected in forward bias? It allows current to flow.
Why is rectification important in electronic circuits? Electronic components require DC to function properly.
Created by: user-1953087
 

 



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