Q. Assertion (A): Potentiometers can not be used as error detectors in position control systems.

Reason (R): The resolution of a potentiometer places an upper limit on its accuracy

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Q. Bellows converts

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Q. Assertion (A): The steady state response, of a stable, linear, time invariant system, to sinusoidal input depends on initial conditions.

Reason (R): Frequency response, in steady state, is obtained by replacing s in the transfer function by jω

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Q. Bode magnitude plot is drawn between

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Q. First column elements of Routh's tabulation are 3, 5, -3/4, 1/2, 2. It means that there

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Q. When a unit step voltage drives a lag network the output

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Q. A system has its two poles on the negative real axis and one pair of poles lies on jω axis. The system is

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Q. In a minimum phase system

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Q. A stepper motor is

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Q. In a two phase ac servomotor rotor resistance is R and rotor reactance is X. The speed curve will be linear if

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Q. From the noise point of view, bandwidth should

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Q. The primary function of lag compensator is to provide sufficient

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Q. The polar plot of a transfer function passes through (-1, 0) point. The gain margin is

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Q. For a quadratic factor in transfer function the phase angle is not a function of damping factor.

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Q. The current rating of dc tachogenerator is usually

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Q. In a second order system, the time constant t of exponential envelopes depends

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Q. If feedback factor is β the overall gain of a closed loop system is approximately equal to

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Q. In control systems the magnitude of error voltage

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Q. The slope of log-magnitude asymptote changes by - 40 dB/ decade at a frequency ω₁. This means that

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Q. For a factor 1/(jω)² in the transfer function, the log magnitude plot

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