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Question 1 of 15
The transfer function of a second order real system with a perfectly flat magnitude response of a unity has pole at 2-j3.List all the poles and zeroCorrect
Question 2 of 15
The open loop of a third oder unity feedback system are at 0,-1,-2.Let the frequency corresponding to the point where the root locus of the system transits to unstable region be K.Now suppose we introduce a zero in the open loop transfer function at -3 while keeping all the earlier open loop poles intact.Which one of the following is true about the point where the root locus of the modified system transits to unstable region?Correct
Question 3 of 15
Two single phase transformers T1 and T2 each are rated at 500kVA are operated in parallel.Percentage impedances of T1 and T2 are 1+j6 and .8+j4.8. To share a load of 1000kVA at .8 lagging factor the contribution of T2 in kVA isCorrect
Question 4 of 15
Given f(z) = g(z) + h(z) where f,g,h are complex valued functions of a complex variable z.Which one of the following statements is true?Correct
Question 5 of 15
Match the following
P.Permanent magnet moving coil
Q.Moving iron connected through current transformer
3.AC and DCCorrect
Question 6 of 15
A 3-phase balanced load which has a power factor of .707 is connected to a balanced supply.The power consumed by the load is 5kW.The power is measured by the two wattmeter method.The readings of the two wattmeters areCorrect
Question 7 of 15
When a bipolar junction transistor is operating in the saturation mode which one of the following statements is true about the state of its collector base (CB) and the base emitter (BE) junctions?Correct
Question 8 of 15
A 4 pole separately excited wave wound DC machine with negligible armature resistance is rated for 230V and 5kW at a speed of 1200rpm.If the same armature coils are reconnected to form a lap winding what is the rated voltage (in volts) and power in (kW) respectively at 1200 rpm of the reconnected machine if the field circuit is left unchanged?Correct
Question 9 of 15
An open loop control system results in a response of e to the power of -2t (sin5t+ cos5t) for a unit impulse input.The DC gain of the control system isCorrect
Question 10 of 15
The volume enclosed by the surface f(x,y) = e to the power x over the triangle bounded by the lines x=y;x=0;y=1 in the xy plane isCorrect
Question 11 of 15
Two coins R and S are tossed.The four joined events HrHs,TrTs,HrTs,TrHs have probabilities .28,.18,.30 and .24 respectively where H represents head and T represents Tail.Which of the following is true?Correct
Question 12 of 15
A differential equation di/dt – .2i = 0 is applicable over -10Correct
Question 13 of 15
For linear time invariant systems that are bounded input bounded output stable which one of the following statements is true?Correct
Question 14 of 15
Two identical coils each having inductance L are placed together on the same core.If an overall inductance of aL is obtained by interconnecting these two coils the minimum value of a isCorrect
Question 15 of 15
An open loop transfer function G(s) of a a system is
G(s) = K / [s(s+1)(s+2)]
for unity feedback system the breakway point of the root loci on the real axis occurs atCorrect