Consider the following statements (A) and (B) and identify the correct answer.
(A) A Zener diode is connected in reverse bias, when used as a voltage regulator.
(B) The potential barrier of p-n junction lies between 0.1 V to 0.3 V.
A
(A) is incorrect but (B) is correct.
B
(A) and (B) both are correct.
C
(A) and (B) both are incorrect.
D
(A) is correct and (B) is incorrect.
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.
A
No current will flow in p-type, current will only flow in n-type
B
Current in n-type = current in p-type
C
current in p-type > current in n-type
D
current in n-type > current in p-type
3
NEET 2021
MCQ (Single Correct Answer)
+4
-1
For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal y?
A
B
C
D
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
For transistor action, which of the following statements is correct?
A
Base, emitter and collector regions should have same size.
B
Both emitter junction as well as the collector junction are forwarded biased.
C
The base region must be very thin and lightly doped.
D
Base, emitter and collector regions should have same doping concentrations.
