TERM TEST - FEEDBACK AND CONTROL SYSTEM

Transfer function is the mathematical representation of the relationship between _______ and ______ of the system.

• a. impulse, response
• b. input, output
• c. difference, similarity
• d. none of the above

Zero initial condition for a system means

• a. Input reference signal is zero
• b. Zero stored energy
• c. No initial movement of moving parts
• d. System is at rest and no energy is stored in any of its components

Which of the following is an advantage of Laplace transform method?

• a. It gives solution in frequency domain only
• b. It gives total solution more systematically
• c. Initial conditions are incorporated in the very first step
• d. both b and c

In the transfer function,𝐺(𝑠)=𝑈(𝑠) / 𝑌(𝑠), what does Y(s) represent?

• a. Time constant
• b. Output signal
• c. Transfer function
• d. Laplace transform of input signal

Assertion (A): An RC circuit acts as a low-pass filter. Reason (R): In RC circuit, the output is measured in capacitor. The capacitor is affected by the frequency. Thus, a low-pass filter allows low-frequency signals to pass through while attenuating higher-frequency signals.

• a. A is true, but R is not the correct explanation of A
• b. A is false, but R is the correct explanation of A
• c. Both A and R are true
• d. None of the above

Assertion (A): An RL circuit acts as a low-pass filter. Reason (R): In RL circuit, the output is measured in inductor. The inductor is affected by the frequency. Thus, a high-pass filter allows high-frequency signals to pass through while attenuating lower-frequency signals.

• a. A is true, but R is not the correct explanation of A
• b. Both A and R are false
• c. All of the above
• d. None of the above

The transfer function has poles at:

• a. s=3, s=4
• b. s=7
• c. s=-3, s=-4
• d. Cannot be determined

What is the role of zeros in a transfer function?

• a. They determine stability.
• b. They influence the frequency response.
• c. They represent the initial conditions.
• d. They determine the time constant.

The poles of a transfer function are determined by the:

• a. O
• b. X and O
• c. Numerator polynomial
• d. Denominator polynomial

For a stable system, where should the poles be located in the complex plane?

• a. In the right-half plane
• b. On the imaginary axis
• c. In the left-half plane
• d. In the upper-half plane