Instrumentation Engineering
GATE IN format:nat PYQs
Build your understanding with focused practice from past exam papers.
Questions 231–240 of 270. Imported answers require independent review unless marked reviewed.
Question 42
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The circuit given uses ideal opamps. The current I (in
A) drawn from the source
is (up to two decimal places) ____. 
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A portion of an assembly language program written for an 8-bit microprocessor is given below along with explanations. The code is intended to introduce software time delay. The processor is driven by a 5 MHz clock. The time delay (in
s) introduced by the program is ______.Instruction | Explanation |
|---|---|
MVI B, 64H | Move immediate the given byte into register B. Takes 7 clock periods. |
LOOP: DCR B | Decrement register B. Affects Flags. Takes 4 clock periods. |
JNZ LOOP | Jump to address with Label LOOP if zero flag is not set. Takes 10 clock periods when jump is performed and 7 clock periods when jump is not performed. |
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The voltage and current drawn by a resistive load are measured with a 300 V voltmeter of accuracy ± 1% of full scale and a 5 A ammeter of accuracy ± 0.5% of full scale. The readings obtained are 200 V and 2.5 A. The limiting error (in %) in computing the load resistance is (up to two decimal places) ___.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 48
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A high Q coil having distributed (self) capacitance is tested with a Q-meter. First resonance at ω₁ = 10⁶ rad/s is obtained with a capacitance of 990 pF. The second resonance at ω₂ = 2 × 10⁶ rad/s is obtained with a 240 pF capacitance. The value of the inductance (in mH) of the coil is (up to one decimal place) _____.
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The inductance of a coil is measured using the bridge shown in the figure. Balance (D = 0) is obtained with C₁ = 1 nF, R₁ = 2.2 MΩ, R₂ = 22.2 kΩ, R₄ = 10 kΩ. The value of the inductance Lₓ (in mH) is ______.
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The average velocity v of flow of clear water in a 100 cm (inner) diameter tube is measured using the ultrasonic flow meter as shown in the figure. The angle θ is 45°. The measured transit times are t₁ = 0.950 ms and t₂ = 1.000 ms. The velocity v (in m/s) in the pipe is (up to one decimal place) ___.
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A 100 Ω strain gage (R₉) has a gage factor of 2.5. It is connected in the bridge as shown in figure. The strain gage is subjected with a positive strain of 400 μm/m. The output Vₒ (in mV) of the bridge is (up to two decimal places) _____.
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Assuming ideal opamp, the RMS voltage (in mV) in the output Vₒ only due to the 230 V, 50 Hz interference is (up to one decimal place) _____.
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The sampling rate for Compact Discs (CDs) is 44,000 samples/s. If the samples are quantized to 256 levels and binary coded, the corresponding bit rate (in bits per second) is _____.
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A Michelson Interferometer using a laser source of wavelength λ₀ = 500 nm, with both the mirrors (M₁ & M₂) fixed and positioned equidistant from the splitter/combiner is shown in the figure. When a dielectric plate of refractive index n = 1.5, of thickness t, is placed in front of the mirror M₂, a dark fringe is observed on the detector. If the dielectric plate is removed without changing the position of the mirrors M₁ & M₂, a bright fringe is observed on the detector. The minimum thickness t (in nm) of the dielectric is _______.
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