GATE IN format:nat PYQs & Answers — Page 23

Questions 221–230 of 270. Imported answers require independent review unless marked reviewed.

Topic practice 270 questionsPage 23 of 27

A 300 V, 5A, 0.2 pf low power factor wattmeter is used to measure the power consumed by a load. The wattmeter scale has 150 divisions and the pointer is on the 100ᵗʰ division. The power consumed by the load (in Watts) is ____ .

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As shown in the figure, temperature

is measured using a K type thermocouple. It has a sensitivity of 40

V/°C. The gain (G) of the ideal instrumentation amplifier is 25. If the output

is 96 mV, then the value of

(in °C) is ___.

Diagram for Instrumentation Engineering question 22

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An amplitude modulated signal is shown in the figure. The modulation index is (up to one decimal place) ______.

Diagram for Instrumentation Engineering question 24

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An optical pulse containing

photons is incident on a photodiode and

electron-hole pairs are created. The maximum possible quantum efficiency (in %) of the photodiode is ______.

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In the given circuit, superposition is applied. When

is set to 0 V, the current

is −6 A. When

is set to 0 V, the current

is +6 A. Current

(in A) when both sources are applied will be (up to two decimal places) ____.

Diagram for Instrumentation Engineering question 30

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In the figure, an RLC load is supplied by a 230 V, 50 Hz single phase source. The magnitude of the reactive power (in VAr) supplied by the source is ________.

Diagram for Instrumentation Engineering question 31

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Consider the standard negative feedback configuration with

and

. The number of clockwise encirclements of

in the Nyquist plot of the loop transfer-function

is _____.

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Consider a standard negative feedback configuration with

and

. For the closed loop system to have poles on the imaginary axis, the value of

should be equal to (up to one decimal)_____.

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In the given relaxation oscillator, the opamps and the zener diodes are ideal. The frequency (in kHz) of the square wave output

is _____.

Diagram for Instrumentation Engineering question 40

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An opamp that is powered from a

V supply is used to build a non-inverting amplifier having a gain of 15. The slew rate of the opamp is

V/s. For a sinusoidal input with amplitude of 0.3 V, the maximum frequency (in kHz) up to which it can be operated without any distortion (up to one decimal place) ____.

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GATE IN format:nat PYQs

Question 21

Question 22

Question 24

Question 25

Question 30

Question 31

Question 36

Question 38

Question 40

Question 41