GATE IN discipline:electrical-electronics-and-instrumentation PYQs & Answers — Page 48

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Questions 471–480 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 48 of 65

The input

and output

of a discrete-time system are related as

. The condition on

for which the system is Bounded-Input Bounded-Output (BIBO) stable is

Your answerChoose one option.

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In a cascade control system, the closed loop transfer function of the inner loop may be assumed to have a single time constant

. Similarly, the closed loop transfer function of the outer loop may be assumed to have a single time-constant

. The desired relationship between

and

in a well-designed control system is

Your answerChoose one option.

is much less than

is equal to

is much greater than

is independent of

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The loop-gain function

of a control system with unity feedback is given to be

, where

. If the gain cross-over frequency of the loop-gain function is less than its phase cross-over frequency, the closed-loop system is

Your answerChoose one option.

unstable

marginally stable

conditionally stable

stable

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If each of the values of inductance, capacitance and resistance of a series LCR circuit are doubled, the Q-factor of the circuit would

Your answerChoose one option.

reduce by a factor

reduce by a factor 2

increase by a factor

increase by a factor 2

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In the circuit shown below, the input voltage

is positive. The current (

) - voltage (

) characteristics of the diode can be assumed to be

under the forward bias condition, where

is the thermal voltage and

is the reverse saturation current. Assuming an ideal op-amp, the output voltage

of the circuit is proportional to

Diagram for Instrumentation Engineering question 10

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The correct biasing conditions for typical operation of light emitting diodes, photodiodes, Zener diodes are, respectively

Your answerChoose one option.

forward bias, reverse bias, reverse bias

reverse bias, reverse bias, forward bias

forward bias, forward bias, reverse bias

reverse bias, forward bias, reverse bias

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The circuit shown in the figure below uses ideal positive edge-triggered synchronous J-K flip flops with outputs X and Y. If the initial state of the output is X=0 and Y=0 just before the arrival of the first clock pulse, the state of the output just before the arrival of the second clock pulse is

Diagram for Instrumentation Engineering question 12

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X=0, Y=0

X=0, Y=1

X=1, Y=0

X=1, Y=1

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Thermocouples measure temperature based on

Your answerChoose one option.

Photoelectric effect

Seebeck effect

Hall effect

Thermal expansion

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Four strain gauges in a Wheatstone bridge configuration are connected to an instrumentation amplifier as shown in the figure. From the choices given below, the preferred value for the common mode rejection ratio (CMRR) of the amplifier, in dB, would be

Diagram for Instrumentation Engineering question 14

Your answerChoose one option.

-20

100

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In a single-mode optical fiber, the zero-dispersion wavelength refers to the wavelength at which the

Your answerChoose one option.

material dispersion is zero.

waveguide dispersion is zero.

sum of material dispersion and waveguide dispersion is zero.

material dispersion and waveguide dispersion are simultaneously zero.

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GATE IN discipline:electrical-electronics-and-instrumentation PYQs

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