Electronics and Communication Engineering - Exam Questions Papers
Exercise :: Exam Questions Papers - Exam Paper 20
| 1. |
Compared to a p-n junction with NA = ND = 1014/cm3, which one of the following statements is TRUE for a p-n junction with NA = ND = 1020/cm3? |
| A. |
Reverse breakdown voltage is lower and depletion capacitance is lower | | B. |
Reverse breakdown voltage is higher and depletion capacitance is lower | | C. |
Reverse breakdown voltage is lower and depletion capacitance is higher | | D. |
Reverse breakdown voltage is higher and depletion capacitance is higher |
Answer: Option C
Explanation:
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| 2. |
Which of the following are universal gates? - NAND
- NOR
- XOR
Select the correct answer from the codes given below: |
| A. |
1 and 2 only | | B. |
1 and 3 only | | C. |
2 and 3 only | | D. |
1, 2 and 3 |
Answer: Option A
Explanation:
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| 3. |
Consider the following statements:
To draw a.c. equivalent circuit of a transistors, all - d.c. sources are shorted
- a.c. sources are shorted
- d.c. sources are opened
- a.c. sources are connected to d.c. sources
Which of the above statements is/are correct? |
Answer: Option C
Explanation:
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| 4. |
How many number of branches the root loci of the equation s(s + 2)(s + 3) + K(s + 2) = 0 have? |
Answer: Option D
Explanation:
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| 5. |
For the circuit of the following figure, with an ideal op-amp, the maximum phase shift of the output with reference to the input is :
 |
Answer: Option D
Explanation:
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