The following figure shows a logic gate circuit with two inputs A and B and the output Y. The voltage waveforms of A, B and Y are as given.
The logic gate is
A
NOR gate
B
OR gate
C
AND gate
D
NAND gate
2
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
For transistor action
(1) Base, emitter and collector regions should have similar size and doping concentrations.
(2) The base region must be vety thin and lightly doped.
(3) The emitter-base junction is forward biased and base-collector junction is reverse biased.
(4) Both the emitter-base junction as well as the base-collector junction are forward biased.
Which one of the following pairs of statements is correct?
A
(4) and (1)
B
(1) and (2)
C
(2) and (3)
D
(3) and (4)
3
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A common emitter amplifier has a voltage gain of 50, an input impedance of 100 $$\Omega $$ and an output impedance of 200 $$\Omega $$. The power gain of the amplifier is
A
500
B
1000
C
1250
D
50
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point ?
