Characteristic Curves of a Zener Diode and Finding Reverse Break Down Voltage NEET Questions

Physics - Experimental Skills

Characteristic Curves of a Zener Diode and Finding Reverse Break Down Voltage MCQ Questions


7.
Zener breakdown occurs due to:
A.
High electric field
B.
High temperature
C.
High resistance
D.
High current
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ANSWER :
A. High electric field
8.
In reverse breakdown, the Zener diode maintains:
A.
Constant current
B.
Constant voltage
C.
Increasing resistance
D.
Zero power dissipation
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ANSWER :
B. Constant voltage
9.
The reverse current in a Zener diode increases:
A.
Slowly after breakdown
B.
Linearly with voltage
C.
Exponentially after breakdown
D.
Remains constant
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ANSWER :
C. Exponentially after breakdown
10.
The reverse current of a Zener diode before breakdown is:
A.
Large
B.
Zero
C.
Very small
D.
Infinite
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ANSWER :
C. Very small
11.
A Zener diode is used in voltage regulator circuits because it:
A.
Blocks current flow
B.
Allows high current flow in forward bias
C.
Maintains a constant voltage in reverse bias
D.
Increases resistance with voltage
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ANSWER :
C. Maintains a constant voltage in reverse bias
12.
The forward voltage drop of a Zener diode is approximately:
A.
0.1V
B.
0.3V
C.
0.7V
D.
1.2V
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ANSWER :
C. 0.7V