The peak voltage in the output of a half wave diode rectifier fed with a sinusoidal signal without filter is 10 V. The d.c. component of the output voltage is
Barrier potential of a p-n junction diode does not depened on
A
diode design
B
temperature
C
forward bias
D
doping density
Explanation
Barrier potential does not depend in diode
design while barrier potential depends upon
temperature, doping density and forward biasing.
3
AIPMT 2003
MCQ (Single Correct Answer)
If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be
A
25 Hz
B
50 Hz
C
70.7 Hz
D
100 Hz
Explanation
In full wave rectifier the fundamental
frequency in ripple is twice of input frequency.
4
AIPMT 2003
MCQ (Single Correct Answer)
A n-p-n transistor conducts when
A
both collector and emitter are positive with respect to the base
B
collector is positive and emitter is negative with respect to the base
C
collector is positive and emitter is at same potential as the base
D
both collector and emitter are negative with respect to the base
Explanation
When the collector is positive and emitter
is negative with respect to base, it causes the forward
biasing for each junction, which causes
conduction of current.
Questions Asked from Semiconductor Electronics
On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions