Photodiode Quiz: How Much You Know?
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- 1.When a photon of sufficient energy strikes the diode, it excites an electron, thereby creating a free electron. What is this phenomenon called?
- A.
Peltier Effect
- B.
Photoelectric Effect
- C.
Seebeck Effect
- 2.By definition, N-type semiconductor has an excess of _______ compared to the P-type region, which has an excess of ______ compared to the N-type region.
- A.
Electrons, holes
- B.
Holes, electrons
- 3.When a diode is reverse biased, the width of the depletion layer __________, causing the capacitance to _________.
- A.
Increases, increase
- B.
Increases, decrease
- C.
Decreases, increase
- D.
Decreases, decrease
- 4.Photodiodes operate by absorption of photons or charged particles and generate a flow of current in an external circuit, _______ to the incident power. The light is absorbed __________ with distance and is _________ to the absorption coefficient.
- A.
Proportional, exponentially, proportional
- B.
Proportional, logarithmically, inversely proportional
- C.
Inversely proportional, exponentially, unrelated
- 5.Dark current is
- A.
Produced by forward biasing the photodiode
- B.
Produced by the random generation of electrons and holes in the depletion region
- C.
Produced by incident photons generating electrons and holes in the depletion region
- 6.
- A.
True
- B.
False
- 7.When the p–n junction is forward biased,
- A.
The electric charge remains the same as the junction barrier is not affected
- B.
The electric charge flow is restricted due to the increased junction barrier
- C.
The electric charge flows freely due to the decreased junction barrier
- 8.If a diode is reverse biased, the voltage at the anode is higher than at the cathode.
- A.
True
- B.
False
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