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1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
In a full wave rectifier circuit operating from $$50$$ $$Hz$$ mains frequency, the fundamental frequency in the ripple would be
A
$$25$$ $$Hz$$
B
$$50$$ $$Hz$$
C
$$70.7$$ $$Hz$$
D
$$100$$ $$Hz$$
2
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
$$0$$
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
When $$p$$-$$n$$ junction diode is forward biased then
A
both the depletion region and barrier height are reduced
B
the depletion region is widened and barrier height is reduced
C
the depletion region is reduced and barrier height is increased
D
both the depletion region and barrier height are increased
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