The unit step response of a system with the transfer function is given by
which one of the following waveforms?

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option A**

**Explaination / Solution: **

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Negative feedback in a closed-loop control system DOES NOT

**A. ** reduce the overall gain

**B. ** reduce bandwidth

**C. ** improve disturbance rejection

**D. ** reduce sensitivity to parameter variation

**Answer : ****Option B**

**Explaination / Solution: **

Negative feedback in closed-loop control system does not reduce bandwidth.

Negative feedback in closed-loop control system does not reduce bandwidth.

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If then the region of convergence (ROC) of its Z-transform in the
Z-plane will be

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option C**

**Explaination / Solution: **

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The unit step response of an under-damped second order system has steady state value of -2. Which one of the following transfer functions has theses properties ?

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option B**

**Explaination / Solution: **

For under-damped second order response

For under-damped second order response

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The transfer function of the system Y(s)/U(s) whose state-space equations are given below is:

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option D**

**Explaination / Solution: **

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A speed signal, band limited to 4 kHz and peak voltage varying between +5 V and -5 V, is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits.
The number of quantization levels required to reduce the quantization noise by a factor of 4 wo

**A. ** 1024

**B. ** 512

**C. ** 256

**D. ** 64

**Answer : ****Option B**

**Explaination / Solution: **

No Explaination.

No Explaination.

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The transfer function of the circuit shown below is

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option D**

**Explaination / Solution: **

No Explaination.

No Explaination.

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Two systems H_{1}(Z) and H_{2}(Z) are connected in cascade as shown below. The
overall output y(n) is the same as the input x(n) with a one unit delay. The
transfer function of the second system H_{2}(Z)is

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option B**

**Explaination / Solution: **

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The first two rows of Routh's tabulation of a third order equation are as follows.

**A. ** two roots at s= ± j and one root in right half s-plane

**B. ** two roots at s = ± j2 and one root in left half s-plane

**C. ** two roots at s= ± j2 and one root in right half s-plane

**D. ** two roots at s = ± j and one root in left half s-plane

**Answer : ****Option D**

**Explaination / Solution: **

No Explaination.

s^{3} 2 4

s^{2} 4 4.

This means there are

No Explaination.

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Consider a stable system with transfer function

**A. ** p = 0 and q = 3

**B. ** p = 1 and q = 7

**C. ** p = 2 and q = 3

**D. ** p = 3 and q = 5

**Answer : ****Option A**

**Explaination / Solution: **

Where b_{1},
---, b_{p }and a_{1},
---, a_{q }are real valued constants. The slope of the Bode log magnitude curve of G(s) converges to -60 dB/decade as 𝜔 ⟶ ∞. A possible pair of values for p and q is

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**Preparation Study Material**- Circuit Theory (Study/Preparation)
- Electromagnetic Theory (Study/Preparation)
- Digital Logic Circuits (Study/Preparation)
- Signals and Systems (Study/Preparation)
- Electrical Machines I (Study/Preparation)
- Electrical Machines II (Study/Preparation)
- Transmission and Distribution (Study/Preparation)
- Power System (Study/Preparation)
- Control Systems (Study/Preparation)
- Digital Logic Circuits (Study/Preparation)
- Electronic Devices and Circuits (Study/Preparation)
- Microprocessors and Microcontrollers (Study/Preparation)
- Power Electronics (Study/Preparation)

- Engineering Mathematics (Practise Test)
- Electric Circuits (Practise Test)
- Electromagnetic Fields (Practise Test)
- Signals and Systems (Practise Test)
- Electrical Machines (Practise Test)
- Power Systems (Practise Test)
- Control Systems (Practise Test)
- Electrical and Electronic Measurements (Practise Test)
- Analog and Digital Electronics (Practise Test)
- Power Electronics (Practise Test)