1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table.

AIPMT 2007 Physics - Semiconductor Electronics Question 62 English
A
$$\matrix{ A & B & Y \cr 0 & 0 & 1 \cr 0 & 1 & 1 \cr 1 & 0 & 1 \cr 1 & 1 & 0 \cr } $$
B
$$\matrix{ A & B & Y \cr 0 & 0 & 1 \cr 0 & 1 & 0 \cr 1 & 0 & 0 \cr 1 & 1 & 0 \cr } $$
C
$$\matrix{ A & B & Y \cr 0 & 0 & 0 \cr 0 & 1 & 1 \cr 1 & 0 & 1 \cr 1 & 1 & 1 \cr } $$
D
$$\matrix{ A & B & Y \cr 0 & 0 & 0 \cr 0 & 1 & 0 \cr 1 & 0 & 0 \cr 1 & 1 & 1 \cr } $$
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Which one of the following represents forward bias diode ?
A
AIPMT 2006 Physics - Semiconductor Electronics Question 32 English Option 1
B
AIPMT 2006 Physics - Semiconductor Electronics Question 32 English Option 2
C
AIPMT 2006 Physics - Semiconductor Electronics Question 32 English Option 3
D
AIPMT 2006 Physics - Semiconductor Electronics Question 32 English Option 4
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A transistor is operated in common emitter configuration at constant collector voltage VC = 1.5 V such that a change in the base current from 100 $$\mu $$A to 150 $$\mu $$A profuces a change in the collector current from 5 mA to 10 mA. The current gain $$\beta $$ is
A
50
B
67
C
75
D
100
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The following figure shows a logic gate circuit with two inputs A and B and the output C.

AIPMT 2006 Physics - Semiconductor Electronics Question 59 English 1

The voltage waveforms of A, B and C are as shown below.

AIPMT 2006 Physics - Semiconductor Electronics Question 59 English 2

The logic circuit gate is
A
OR gate
B
AND gate
C
NAND gate
D
NOR gate
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