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Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 20
36.
Which of the following is/are correct statement(s)?
  1. Bus is a group of wires carrying information.
  2. Bus is needed to achieve reasonable speed of operation.
  3. Bus can carry data or address.
  4. A bus can be shared by more than one device.
Select the correct answer from the codes given below
1 only
1 and 2 only
2, 3 and 4 only
1, 2, 3 and 4
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.

Assertion (A): A fixed bias BJT circuit exhibits better performance as compared to a self bias BJT circuit.

Reason (R): A fixed bias BJT circuit used less components as compared to a self bias BJT circuit.

Both A and R are individually true and R is the correct explanation of A
Both A and R are individually true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
A linear time-invariant, causal continuous time system has a rational transfer function with simple poles at s = - 2 and s = - 4, and one simple zero at s = - 1. A unit step u(t) is applied at the input of the system. At steady state, the output has constant value of 1. The impulse response of this system is
[exp (- 2t) + exp (-4t)] u(t)
[-4 exp (- 2t) + 12 exp (-4t) - exp (-t)] u(t)
[-4 exp (- 2t) + 12 exp (-4t)] u(t)
[-0.5 exp (- 2t) + 1.5 exp (-4t)] u(t)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
The signal cos ωct + 0.5 cos ωmt sin ωct is
FM only
AM only
both AM & FM
neither AM nor FM
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Which one of the following is a transferred electron device?
BARITT diode
IMPATT diode
TRAPATT diode
Gunn diode
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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