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1
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
In the following figure, the diodes which are forward biased, are

AIPMT 2011 Mains Physics - Semiconductor Electronics Question 77 English
A
(A), (B) and (D)
B
(C) only
C
(C) and (A)
D
(B) and (D)
2
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
A Zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in figure. The current through the diode is

AIPMT 2011 Mains Physics - Semiconductor Electronics Question 78 English
A
5 mA
B
10 mA
C
15 mA
D
20 mA
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
In forward biasing of the p-n junction
A
the positive terminal of the battery is connected to p-side and the depletion region becomes thick.
B
the positive terminal of the battery is connected to n-side and the depletion region becomes thin.
C
the positive terminal of the battery is connected to n-side and the depletion region becomes thick.
D
the positive terminal of the battery is connected to p-side and the depletion region becomes thin.
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
If a small amount of antimony is added to germanium crystal
A
it becomes a p-type semiconductor
B
the antimony becomes an acceptor atom
C
there will be more free electrons than holes in the semiconductor
D
its resistance is increased
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