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- Question 1 of 16
##### 1. Question

Negative feedback in closed loop control system does not

CorrectIncorrect - Question 2 of 16
##### 2. Question

“A unity negative feedback system has the open loop transfer function

G(s) = K/[s(s+1)(s+3)]

The value of the gain K(greater than 0) at which the root locus crosses the imaginary axis is

CorrectIncorrect - Question 3 of 16
##### 3. Question

The polar plot of the transfer function

G(s) = [10(s+1)]/s+10 for 0<=w< infinity will be in the

CorrectIncorrect - Question 4 of 16
##### 4. Question

A sinusoidal signal of 2kHz frequency is applied to a delta modulator.The sampling rate and step size of the delta modulator are 20,000 samples per second and .1V respectively.To prevent slope overload the maximum amplitude of sinusoidal signal in volts is (pi is constant 3.14)

CorrectIncorrect - Question 5 of 16
##### 5. Question

The damping ratio of a series RLC circuit can be expressed as

CorrectIncorrect - Question 6 of 16
##### 6. Question

The built in potential of an abrupt p-n junction is .75V.If its junction capacitance at a reverse bias of 1.25V is 5pF the value of junction capacitance in pF when Vr = 7.25V is

CorrectIncorrect - Question 7 of 16
##### 7. Question

A MOSFET in saturation has a drain current of 1mA for Vds = .5V.If the channel length modulation coefficient is .05 per V the output resistance os the MOSFET is

CorrectIncorrect - Question 8 of 16
##### 8. Question

The open loop transfer function of a plant in a unity feedback configuration is given as

G(s) = [K(s+4)]/[(s+8)(s*s-9)]

The value of gain K (>0) for which -1+j2 lies on the root locus is

CorrectIncorrect - Question 9 of 16
##### 9. Question

A lead compensator network includes a parallel combination of R and C in the feed forward path.If the transfer function of the compensator is

G(s) = (s+2)/(s+4) the value of RC is

CorrectIncorrect - Question 10 of 16
##### 10. Question

A plant transfer function is given as

G(s) = [Kp + Ki/s][1/{s(s+2)}]

when the plant operates in a unity feedback configuration the condition for the stability of the closed loop system is

CorrectIncorrect - Question 11 of 16
##### 11. Question

The transmitted signal in a GSM system is of 200kHz bandwidth and 8 users share a common bandwidth using TDMA.If at a given time 12 users are are talking in a cell the total bandwidth of the signal received by the base station of the cell will be at least

CorrectIncorrect - Question 12 of 16
##### 12. Question

Let f(z) = (az+b)/(cz+d). If f(z1) = f(z2) for all z1 not equal to z2,a=2,b=4 and c=5 then d should be equal to

CorrectIncorrect - Question 13 of 16
##### 13. Question

The general solution of the differential equation dy/dx = (1+cos2y)/(1-cos2x) is

CorrectIncorrect - Question 14 of 16
##### 14. Question

In an 8085 microprocessor which one of the following instructions changes the content of the accumulator?

CorrectIncorrect - Question 15 of 16
##### 15. Question

By performing cascading and/or summing/differencing operations using transfer function blocks G1(s) and G2(s) one cannot realize a transfer function of the form

CorrectIncorrect - Question 16 of 16
##### 16. Question

A unity negative feedback system has an open loop transfer function

G(s) = K/[s(s+10)]

The gain K for the system to have a damping ratio of .25 is

CorrectIncorrect