Electronics and Communication Engineering - Signals and Systems
Exercise :: Signals and Systems - Section 5
| 1. |
The unit step response of a system starting from rest is given by c(t) = 1 - e-2t for t ≥ 0. The transfer function of the syste is |
Answer: Option B
Explanation:
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| 2. |
check the following system for causality - y[n] = x[n] + 2x[n - 1]
- y[n] =
 x[n - k] - y[n] = x[2n]
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| A. |
(1) and (2) | | B. |
(2) and (3) | | C. |
(1) omly | | D. |
(1) and (3) |
Answer: Option C
Explanation:
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| 3. |
If the system transfer function of a discrete time system  then system is |
| A. |
stable | | B. |
unstable | | C. |
stable at z = 1 | | D. |
unstable at z = 1 |
Answer: Option A
Explanation:
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| 4. |
Two rectangular waveforms of duration t1 and t2 seconds are convolved. What is the shape of the resulting waveform? |
| A. |
Triangular | | B. |
Rectangular | | C. |
Trapezoidal | | D. |
Semi-circular |
Answer: Option C
Explanation:
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| 5. |
The function Ae(s + jω)t represens a rotating phasor having a magnitude increasing with time. |
Answer: Option A
Explanation:
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