The Photodiode, Solar Cell, and Zener Diode; Zener Diode as a Voltage Regulator NEET Questions

Physics - Electronic Devices

The Photodiode, Solar Cell, and Zener Diode; Zener Diode as a Voltage Regulator MCQ Questions


1.
What is the primary function of a photodiode?
A.
Converting light into current
B.
Amplifying current
C.
Storing charge
D.
Generating voltage pulses
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ANSWER :
A. Converting light into current
2.
A photodiode is typically operated in which mode?
A.
Forward bias
B.
Reverse bias
C.
Zero bias
D.
High forward current
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ANSWER :
B. Reverse bias
3.
Which type of semiconductor material is used in solar cells?
A.
Silicon
B.
Germanium
C.
Gallium Arsenide
D.
Copper oxide
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ANSWER :
A. Silicon
4.
A photodiode operates in which bias condition?

NEET - 2015

A.
Forward bias
B.
Reverse bias
C.
No bias
D.
Both forward and reverse bias
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ANSWER :
B. Reverse bias
5.
In a Zener diode voltage regulator, what happens when the input voltage increases?

NEET - 2024

A.
Output voltage increases proportionally
B.
Output voltage remains nearly constant
C.
Output voltage becomes zero
D.
Output voltage decreases slightly
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ANSWER :
B. Output voltage remains nearly constant
6.
What is the efficiency range of a typical commercial solar cell?
A.
5-10%
B.
15-20%
C.
30-40%
D.
50-60%
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ANSWER :
B. 15-20%