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Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 17
21.
Consider the following statements:
  1. Acceptor level is formed very close to the conduction band.
  2. The effective mass of the free electron is same as that of a hole.
  3. The magnitude of the charge of a free electron is same as that of a hole.
  4. Addition of donor impurities adds holes to the semiconductor.
Which of the above statements are correct?
1 and 3
2 and 3
2 and 4
3 and 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
The following properties are associated with ferroelectric materials:
  1. Its susceptibility is negative.
  2. The susceptibility is expressed as
    where c is the Curie constant and Tc is the Curie temperature.
  3. It has permanent dipoles oriented randomly.
Which of the above statements is/are correct?
1 only
1 and 3
2 only
1, 2 and 3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Consider the following statements:
For a master-slave J-K flip-flop,
  1. the toggle frequency is the maximum clock frequency at which the flip-flop will toggle reliably.
  2. the data input must precede the clock triggering edge transition time by time minimum time.
  3. the data input must remain fixed for a given time after, the clock triggering edge transition time for reliable operation.
  4. propagation delay time is equal to the rise time and fall time of the data.
Which of the above statements is/are correct?
1, 2 and 3
1 and 2 only
2 and 3 only
3 and 4 only
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
There are four different algorithms A1, A2, A3 and A4 to solve, a given problem with the complexity order log(n), log(log(n)), n log and n/log(n) respectively. Which is the best algorithm?
A1
A2
A3
A4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
In Quine-Mclusky method of Boolean function reduction; __________ , are treated as __________ and therefore discrepancies may occur in the final solution, therefore this method is not applicable to the functions with __________ .
zeros, don't care conditions, zeros
one's, don't care conditions, one's
don't care conditions, zeros, don't care conditions
don't care conditions, don't care conditions, don't care conditions
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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