QUIZ (Basic Principle of Photodiode)

What is the difference between photodiode and LED?

• Photodiode emits light which is working under reverse bias, while LED detects light which is working under forward bias

• Photodiode detect light which is working under reverse bias, while LED emits light which is working under forward bias

• Photodiode detect light which is working under forward bias, while LED emits light which is working under reverse bias

• Photodiode emits light which is working under forward bias, while LED detects light which is working under reverse bias

Which picture shows the photodiode symbol?

• 
• 
• 
• 

Which statement is true about photodiode?

• Anode (the longer lead). This is the positive (+) pin of the IR diode, but inversely connected to the ground during usage

• Anode (the shorter lead). This is the negative (ground) pin of the IR diode, but inversely connected to supply voltage during usage

• Cathode (the shorter lead). This is the positive (+) pin of the IR diode, but inversely connected to supply voltage during usage

• Cathode (the longer lead). This is the negative (ground) pin of the IR diode, but inversely connected to the ground during usage

• Based on the graph, at 20 mW/cm² and V_R = 10 volts. Resistance value for this condition is...

• 91 kΩ

• 182 kΩ

• 364 kΩ

• 728 kΩ

The ratio of current produced through the photodiode to the light incident on the diode is called by ...

• Dark current

• Photocurrent

• Response time

• Responsivity