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Standard X
General Knowledge
Basic Physics
Question

How do diodes work in an AC circuit?

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Solution
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Answer
Diodes conduct only when forward biased and restrict the flow of charges when reverse biased.
Explanation:
Diodes conduct only when they are forward biased. Since, AC reverses it direction periodically, the diode conducts only in half cycles and insulates during the other cycles.
This property of a diode is used in rectification of AC into DC.
In that case, two diodes (for a center tap rectifier) or four diodes are used.

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