Electronics and Communication Engineering - Analog Electronics

21. 

The static characteristic of an adequately forward biased p-n junction is a straight line if the plot is of

A. log I vs log V
B. log I vs V
C. I vs log V
D. I vs V

Answer: Option B

Explanation:

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22. 

The main use of JFET with a

A. frequency mixer
B. source follower
C. voltage doubler
D. trigger

Answer: Option B

Explanation:

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23. 

Assertion (A): A dc stabilizer has constant output voltage irrespective of variations in input voltage and load current

Reason (R): A dc series regulator uses a zener diode across the load to stabilize the output voltage.

A. Both A and R are correct and R is correct explanation for A
B. Both A and R are correct but R is not correct explanation for A
C. A is correct R is wrong
D. A is wrong R is correct

Answer: Option B

Explanation:

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24. 

In the self biasing scheme (RF across collector to base) of BJT, S1 tends to unity by __________ RC is the collector load Resistance.

A. increasing RF
B. decreasing RF
C. decreasing RF and increasing RC
D. increasing RF and decreasing RC

Answer: Option C

Explanation:

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25. 

In op-amp integrating amplifier the input is feed to

A. inverting input
B. non-inverting input
C. both inverting and non-inverting input
D. either inverting or non-inverting input

Answer: Option A

Explanation:

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