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Electronics and Communication Engineering - Exam Questions Papers

Exercise : Exam Questions Papers - Exam Paper 19
11.
The circuit shown below is the equivalent circuit of which one of the following microwave resonator types?
Butterfly resonator
Parallel-wire resonator
Cavity resonator
Coaxial line resonator
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Consider the cascade structure of two filters.

Consider the following statements.
  1. If f1 < f2 then it acts like band-pass filter
  2. If f1 < f2 then it acts like band-pass only if HPF follows LPF in other case it acts like a band stop filter
  3. If f1 > f2 then it acts all stop filter
The correct statements are:
1 and 3
only 2
2 and 3
only 3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
A small signal source vi(t) = A cos 20t + B sin106t is applied to a transistor amplifier as shown below. The transistor has β = 150 and hie = 3 kΩ. Which expression best approximates V0(t)
v0(t) = -1500 (A cos 20t + B sin 106t)
v0(t) = -150 (A cos 20t + B sin 106t)
v0(t) = -1500 B sin 106t
V0(t) = -1500 sin 106t
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Consider the following circuits. Assume all gates to have finite propagation delay

Which of these circuits generate a periodic square wave at the output Vo?
(1) only
(1) and (2) only
(2) (3) and (4) only
All (1) (2) (3) and (4)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Which of the following does not apply to Yagi-Uda antenna
High gain
Reasonably good bandwidth
Folded dipole
Parasitic elements
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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