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Question 1. A second order system has a transfer function given by 25/(s2 + 8s + 25) if the system initially at rest is subject to a unit step input at t = Π/3. The second maximum overshoot occurs at
(A) Π/3 (B) 2Π/3 (C) Π (D) 4Π/3
Question 2. The closed loop transfer function is 4/(s+10)(s+100). Calculate time required to reach 2% of steady state value when input is u(t)
(A) 0.072 sec (B) 0.4 sec (C) 40 sec (D) 400 sec
Question 3. The block diagram of a closed loop control system is given by figure the values of k and p such that the system has a damping ratio 0.7 and an undamped natural frequency Z of 5 rad/sec, are respectively equal to
(A) 20 and 0.3 (B) 20 and 0.2 (C) 25 and 0.3 (D) 25 and 0.2
Question 4. If the open loop transfer function of a negative feedback control system is G(s)H(s) = k/(s+1)3, then the gain k for a closed loop pole at (-1/2 + j√3/2) is ________.
Derive an expression for the surface current density (Js) on the conductor surface. In a diagram show the vector relationships among Js , the magnetic field Hs at the surface of the conductor, and the incident electric field vector.
Cradle to death is a typical lifecycle for any given application. The useful life of a particular application will vary based on advancements in a given discipline. It is critical to continuously seek and identify new ways to adapt technology.
The rotor winding consists of 55 turns per pole with a winding factor ofKr=0.89. The peak value of a fundamental air-gap flux densityis limited to 1.0T and the rotor winding current to 2900A.C
Consider the circuit in given Figure with transistor parameters, hFE = 120, VBE (on) = 0.7 V, and VA = ∞. Using nodal analysis, determine the input resistance Ri f.
Explain why the C0 and C1 probabilities of a PI may not be equal to 0.5. Give an example of a circuit or application where this could occur.
A known vapor pressure value for ethanol is 221.3 mmhg. what temperature does this vapor pressure compressed to when compared to ethanol's boiling point.
resistor: a volt-ohmmeter with an internal impedance of 1000 Ω/V and an EVM with an impedance of 11 MΩ. Calculate the voltage indicated by each of these devices.
The chosen switch to be used in an inverter is an IGBT (Insulated Gate Bipolar junction Transistor), the voltage-controlled drive side of a MOSFET with the power side of a power transistor.
Insert a dominant pole such that the phase margin is 45 degrees. Assume the original poles remain fixed. What is the dominant pole frequency.
Simulate the voltage-doubler rectifier circuit in Fig. P3.101 for C = 500 F and vI = 1500 sin 2π(60)t with a load resistance of RL = 3000 Ω added between vO and ground. Calculate the ripple voltage and compare to the simulation.
If the analog signal is to be converted to a digital signal by sampling, how frequently must the meter output be sampled?
The dissociation energy of a carbon-bromine bond is typically about 210 kJ/mol. What is the maximum wavelength of photons that can cause C-Br bond dissociation?
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