A unity feedback system has the open loop transfer function shown below. Find the imaginary axis crossing of the root locus to three significant figures. Your answer must be the imaginary part without the j. HG(s) = K s(s²+8s+17)

For a negative unity feedback system. R(s) + where G(s) 5+1 s²+45+5 the poies of the closed loop system are QA1 and 4 B. None DC 2 and 3 OD A Of 1 and 4 E(s) G(s) C(s)

Consider the following control system: R |Ke s+1 + or- What is the unit-step response for negative feedback, withc = 1.0? This is one out of five questions on the same control system. A C() = 0.5(1 -e") B C() = 0.5(1-e*) C() = 1- e- D C) = 1-e05t

4) A 2300/230V , 60Hz transformer takes 0.5A at a power factor of 0.25 on open circuit when supplied at 230V. (A) find the resistance representing the core loss in ohms, (B) find the magnetizing reactance of the core in ohms, (C) find the magnetizing current in amperes,(D) fine the core loss components of current in amperes Subject Electrical Apparatus and Devices