Q. A unity feedback system has the following open loop frequency response. The gain margin and phase margin are

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Q. For the system in the given figure, the gain margin is

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Q. In the signal flow graph in the given figure the number of forward paths and pairs of non-touching loops are respectively

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Q. In an armature controlled dc motor let J be equivalent moment of inertia of motor and load, f0 be equivalent viscous friction coefficient of motor and load and θ be angular displacement of motor shaft. Then torque equation is

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Q. Consider the following statement:

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Q. The system of the given figure

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Q. For a feedback system given below, the velocity error constant Kv is given by

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Q. If G(s)H(s) is given by following equation, the closed loop pole will be located at s = -12 when K =

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Q. In the given figure, the combinations of two non touching loops is

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Q. For the system in the given figure G varies slightly, the ratio of open loop sensitivity to closed loop sensitivity is

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Q. The loop transfer function of a feedback system is given below. The number of asymptotes of its root loci are

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Q. Consider the following statements:

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Q. For a closed loop system given below. The imaginary axis intercept of the root loci will be

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Q. The polar plot of

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Q. A FET is a __________ controlled device whereas a bipolar transistor is a __________ controlled device.

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Q. In Bode diagram (log magnitude plot) the factor 1/jω in the transfer function gives a line having slope

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Q. A negative feedback system has G(s) = 1/(s+1) and H(s) = K/s(s+2). The closed loop system is stable for

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Q. Mechanical impedance is the ratio of

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Q. Whether a linear system is stable or unstable that it

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Q. A lag compensator is essentially a

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