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Information and Communication Technology System Maintenance (ICTSM)
DIODE RECTIFIER FILTER ZENER DIODE TRANSISTOR
Set 2
Set 2
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Q7051
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Which impurity is added to form P - type semiconductor material?
A
Arsenic
B
Gallium
C
Antimony
D
Phosphorus
Q7052
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Which impurity is added to pure semiconductor to form ?N-type? material?
A
Boron
B
Indium
C
Arsenic
D
Gallium
Q7053
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What is the name of the process of converting AC into DC voltage?
A
Inverting
B
Rectifying
C
Amplifying
D
Demodulating
Q7054
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What is the output pulse frequency of the full wave rectifier with input frequency of 50 Hz?
A
40 Hz
B
60 Hz
C
100 Hz
D
200 Hz
Q7055
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What is the disadvantage of the two diode full wave rectifier compared with a bridge rectifier?
A
DC output level is higher
B
The ripple frequency is higher
C
The need of centretapped transformer
D
Each diode carries half the load current
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