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The semiconductor device that allows current flow in only one direction is called a ________.

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Answer: Diode

Diode is a two-terminal semiconductor device permitting current flow primarily in one direction (forward bias) while blocking reverse current. Applications: rectification (AC to DC), voltage regulation (Zener diode), signal demodulation, and circuit protection. LED is a special diode emitting light when forward-biased.

Topic Electronics Basics
Exam Relevance Railway JE, SSC JE, Banking
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