GE6252 Basic electrical and electronics engineering-important questions

Here we have  provided GE6252 Basic Electrical and Electronics Engineering important questions for the upcoming university exam Nov/Dec 2015.students can download and make use of it.
Regulation 2013, I year 2nd semester GE6252 BEEE part-A and important questions, GE6252 syllabus for NOV/DEC 2015 exam are provided below.

GE6252 BEEE important part-b questions      click here

GE6252 BEEE important questions may/june-2016- click here

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GE6252 BEEE important questions for nov/dec 2015

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what are the biasing conditions for a transistor to act as an amplifier?

Region	Emitter base junction	Collector-base junction	function
Active	Forward biased	Reverse biased	Amplifier
Cut-off	Reverse biased	Reverse biased	Off-switch
saturation	Forward biased	Forward biased	On-switch

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Comparison between zener breakdown and avalanche breakdown

S.NO	Zener breakdown	Avalanche breakdown
1.	Breakdown is due to strong electric field developed across the narrow depletion region.	Breakdown is due to charge multiplication
2.	Observed if Vz > 6 volt	Observed if Vz < 6 volt
3.	The VI characteristics is very sharp with zener breakdown	The VI characteristics is not very sharp with avalanche effect
4.	The breakdown voltage decreases as junction temperature increases	The breakdown voltage increases as junction temperature increases
5.	It occurs in heavly doped diodes	It occurs in normally doped diodes

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What is the difference between fuse and circuit breaker?

(i) Fuse performs both detection and interruption functions. Circuit breaker performs interruption function only. The detection of fault is made by relay system.

(ii) The breaking capacity of fuse is very small compare to that of circuit breaker.

(iii) The operating time of the fuse is smaller than operating time of CB.

(iv) After every operation, replacement is required in the fuse. In case of circuit breaker, replacement is not required.

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Comparison of PN junction diode and zener diode

Comparison of PN junction diode and zener diode

s.no	PN junction diode	zener diode
1	Symbol	Symbol
2.	Operated in forward biased condition and never operated in reverse biased condition	Operated in reverse breakdown region
3	Characteristics lies in 1st   quadrant	Characteristics lies in 3rd  quadrant
4	Applications: Rectifiers, clippers, clampers, voltage multipliers	Applications: Regulator, zener limiters
5	Low power dissipation capability	High power dissipation capability

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