GATE IN concept:voltage PYQs & Answers — Page 2

Questions 11–16 of 16. Imported answers require independent review unless marked reviewed.

Topic practice 16 questionsPage 2 of 2

The resistance of a resistor is measured using a voltmeter and an ammeter. The voltage measurements have a mean value of 1 V and standard deviation of 0.2 V while current measurements have a mean value of 1 mA with standard deviation of 0.05 mA. Assuming that the errors in voltage and current measurements are independent, the standard deviation of the calculated resistance value is ______

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A resistance-meter has five measurement range-settings between 200 Ω and 2 MΩ in multiples of 10. The meter measures resistance of a device by measuring a full-range voltage of 2 V across the device by passing an appropriate constant current for each range-setting. If a device having a resistance value in the range 8 kΩ to 12 kΩ and a maximum power rating of 100 μW is to be measured safely with this meter, the choice for range-setting on the meter for best resolution in measurement, in kΩ, is

Your answerChoose one option.

200

2000

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A voltage of 6 cos (100πt) V is fed as y-input to a CRO. The waveform seen on the screen of the CRO is shown in the figure. The Y and X axes settings for the CRO are respectively

Diagram for Instrumentation Engineering question 20

Your answerChoose one option.

1 V/div and 1 ms/div

1 V/div and 2 ms/div

2 V/div and 1 ms/div

2 V/div and 2 ms/div

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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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When the voltage across a battery is measured using a d.c. potentiometer, the reading shows 1.08 V. But when the same voltage is measured using a Permanent Magnet Moving Coil (PMMC) voltmeter, the voltmeter reading shows 0.99 V. If the resistance of the voltmeter is 1100

, the internal resistance of the battery, in

, is __________.

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The unbalanced voltage of the Wheatstone bridge, shown in the figure,

Diagram for Instrumentation Engineering question 47

is measured using a digital voltmeter having infinite input impedance and a resolution of 0.1 mV. If

, then the minimum value of

to create a detectable unbalanced voltage is __________.

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GATE IN concept:voltage PYQs

Question 23

Question 40

Question 20

Question 47

Question 45

Question 47