Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Tradesman (Electronics andInstrumentation' And exam conducted in the year 2023. And Question paper code was '077/2023'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
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When forward bias is applied to a PN junction diode, its
A) Potential barrier is reduced B) Potential barrier is increased
C) No change in potential barrier D) Junction offers very high resistance
The charge on N type semiconductor is
A) Positive B) Negative
C) Positive or negative D) Electrically neutral
If one diode in the centre-tapped full wave rectifier opens, then rectifier output will be
A) No output
B) No change in output
C) Resembles output from a half wave rectifier
D) Resembles output from a bridge full wave rectifier
When transistor is used as a switch, it operates in
A) The region between cut off region and saturation region
B) Cut off region and saturation region
C) Active region
D) Active region, cut off region and saturation region
In common base amplifier which of the following is wrong ?
A) Input impedance low B) Voltage gain about 150
C) Used for audio frequency application D) Current gain is less than one
In a transistor most of power is dissipated in collector-base junction. It is because
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Collector current is more
Collector base voltage is much greater than emitter-base voltage
Emitter is moderately doped region
Current through collector-base junction is more
Removal of emitter bypass capacitor from the common emitter amplifier results
A) Reduced voltage gain
B) Increased voltage gain
C) No change in voltage gain
D) Infinity voltage gain