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