Electronics and Communication Engineering - Exam Questions Papers

6. 

The pole-zero plot given below corresponds to a

A. low pass filter
B. high pass filter
C. band pass filter
D. notch filter

Answer: Option C

Explanation:

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7. 

Given below impulse response of two system
h1(n) = [x(n + 1) - 2x(n) + 3x(n - 1)]
h2(t) = e-2t u(4 - t)
The correct statement is:

A. h1(n) non causal and stable
h2(t) non causal and stable
B. h1(n) non causal and stable
h2(t) non causal and non-stable
C. h1(n) causal and not stable
h2(t) non causal and stable
D. h1(n) causal and stable
h2(t) non causal and non-stable

Answer: Option B

Explanation:

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8. 

The Gain margin for the system with open loop transfer function :

A.
B. 0
C. 1
D. -∞

Answer: Option A

Explanation:

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9. 

In the circuit shown, what value of RL maximizes the power delivered to RL?

A. 2.4 Ω
B.
C. 4 Ω
D. 6 Ω

Answer: Option C

Explanation:

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10. 

The system which is unstable is __________ .

A. h(t) = RCt . e-1 u(t)
B.
C.
D.

Answer: Option C

Explanation:

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