1
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 ?
A
metallic bonding
B
van der Waal's bonding
C
ionic bonding
D
covalent bonding
2
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
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The symbolic representation of four logic gates are given below

AIPMT 2009 Physics - Semiconductor Electronics Question 65 English

The logic symbols for OR, NOT and NAND gates are respectively
A
(iv), (i), (iii)
B
(iv), (ii), (i)
C
(i), (iii), (iv)
D
(iii), (iv), (ii)
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A transistor is operated in common-emitter configuration at VC = 2V such that a change in the base current from 100 $$\mu $$A to 200 $$\mu $$A produces a change in the collector current from 5 mA to 10 mA. The current gain is
A
100
B
150
C
50
D
75
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