Electronics and Communication Engineering - Electronic Devices and Circuits

21. 

The dc output voltage from a power supply

A. increases with higher values of filter capacitance and decreases with more load current
B. decreases with higher values of filter capacitance and increases with more load current
C. decreases with higher values of filter capacitance as well as with more load current
D. increases with higher values of filter capacitance as well as with more load current

Answer: Option A

Explanation:

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22. 

Avalanche beakdown is primarily dependent on the phenomenon of

A. doping
B. collision
C. recombination
D. ionization

Answer: Option B

Explanation:

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23. 

In a JFET, the drain current is maximum when

A. VGS = VDS
B. VGS = pinch off voltage
C. VGS = 0
D. VGS is negative

Answer: Option C

Explanation:

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24. 

The holes diffuse from P-region to the N-region in a P-N junction diode because

A. there is greater concentration of holes in the P-region as compared to N-region
B. there is greater concentration of holes in the N-region as compared to P-region
C. the free electrons in the N-region attract them
D. potential difference facilities such transfer

Answer: Option A

Explanation:

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25. 

Surface leakage current is a part of

A. reverse current
B. forward current
C. reverse breakdown
D. forward breakdown

Answer: Option A

Explanation:

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