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Zorluk: KolayDiodes

A light-emitting diode (LED) produces light when it is connected in a reverse-bias orientation within a direct current (DC) circuit.

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Cevap

False. A light-emitting diode (LED) produces light only when forward-biased; in a reverse-bias configuration, it blocks current flow and stays dark.
The statement is false because a light-emitting diode (LED) must be forward-biased (anode connected to the positive potential and cathode connected to the negative potential) to conduct electrical current and release energy in the form of light. In a reverse-bias orientation, the diode blocks current and produces no light.

Adım Adım Çözüm

1
Identify the operating requirement of a semiconductor diode and LED.
Diodes conduct electric current in only one direction (forward bias) and block current in the opposite direction (reverse bias).
An LED functions as a standard PN-junction diode with the specialized property of emitting light when electric current conducts through it.
2
Determine the state of the LED in a reverse-bias orientation.
Under reverse bias, the internal depletion region widens, preventing current flow across the junction.
Because no charge carriers cross the junction under reverse bias, no electron-hole recombination occurs, preventing any light emission.

Anahtar Kavram

Light-emitting diodes (LEDs) require forward biasing (anode connected to a higher positive potential than cathode) to conduct current and emit light.
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