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1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A n-p-n transistor conducts when
A
both collector and emitter are positive with respect to the base
B
collector is positive and emitter is negative with respect to the base
C
collector is positive and emitter is at same potential as the base
D
both collector and emitter are negative with respect to the base
2
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Reverse bias applied to a junction diode
A
lowers the potential barrier
B
raises the potential barrier
C
increases the majority carrier current
D
increases the minority carrier current
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be
A
25 Hz
B
50 Hz
C
70.7 Hz
D
100 Hz
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Barrier potential of a p-n junction diode does not depened on
A
diode design
B
temperature
C
forward bias
D
doping density
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