A6 LT5 Flashcards
1
Q
Which material allows a diode to primarily emit light instead of heat?
A
Gallium arsenide (chemical formula GAs).
2
Q
What colors can be emitted by LEDs based on selective control in the doping process?
A
Yellow, green, red, or infrared.
3
Q
What is the PIV rating of LEDs
A
6 V
4
Q
What is the lifetime of LEDs when operated within their limits?
A
Hundreds of thousands of hours.
5
Q
Why is it important to NOT reverse the voltage of an LED?
A
Avoid reversing bias LEDs due to low PIV rating
6
Q
What is the main feature of a light-emitting diode (LED)?
A
Gives off visible light when conducting.
7
Q
Why is it necessary to connect a current-limiting resistor in series with an LED?
A
Forward current rating is only 10 to 50 mA.
8
Q
Infrared LED forward voltage drop
A
1.5 V
