1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In a common base amplifier, the phase difference between the input signal voltage and output voltage is
A
$$\pi $$
B
$${\pi \over 4}$$
C
$${\pi \over 2}$$
D
$$0$$
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
When $$npn$$ transistor is used as an amplifer
A
electrons move from collector to base
B
holes move from emitter to base
C
electrons move from base to collector
D
holes move from base to emitter
3
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
A piece of copper and another of germanium are cooled from room temperature to $$77K,$$ the resistance of
A
copper increases and germanium decreases
B
each of them decreases
C
each of them increases
D
copper decreases and germanium increases
4
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
The manifestation of band structure in solids is due to
A
Bohr's correspondence principle
B
Pauli's exclusion principle
C
Heisenberg's uncertainty principle
D
Boltzmann's law
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