1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
The output from a NAND gate is divided into two in parallel and fed to another NAND gate. The resulting gate is a

NEET 2013 (Karnataka) Physics - Semiconductor Electronics Question 90 English
A
AND gate
B
NOR gate
C
OR gate
D
NOT gate
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
In an unbiased p-n junction, holes diffuse from the p-region to n-region because of
A
The attraction of free electrons of n-region.
B
The higher hole concentration in p-region than that in n-region.
C
The higher concentration of electrons in the n-region than that in the p-region.
D
The potential difference across the p-n junction.
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
One way in which the operation of a n-p-n transistor differs from that of a p-n-p
A
The emitter junction injects minority carries into the base region of the p-n-p
B
The emitter injects holes into the base of the p-n-p and electrons into the base region of n-p-n
C
The emitter injects holes into the base of n-p-n
D
The emitter junction is reversed biased in n-p-n
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In a common emitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and current gain 25. If the above transistor is replaced with another one with transconductance 0.02 mho and current gain 20, the voltage gain will be
A
$${1 \over 3}G$$
B
$${5 \over 4}G$$
C
$${2 \over 3}G$$
D
1.5G
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