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GATE EE 2021: Measurement Quiz 3

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Question 1

A 0 - 150 V voltmeter has a guaranteed accuracy of 1% full scale reading. The voltage measured by this instrument is 83 V. The limiting error will be nearly.

Question 2

The ramp type digital voltmeter can measure accurately with

Question 3

A multimeter is used for the measurement of voltage across a circuit having an output resistance of 20 kΩ. The open circuit voltage of the circuit is 15V and the multimeter is set to 20V scale. If the sensitivity of multimeter is 2000 Ω/V then the percentage error in measurement is

Question 4

A 200 V PMMC voltmeter is specified to be accurate within ±2% of full scale. The limiting error, when the instrument is used to measure a voltage of 100V, is

Question 5

A moving iron instrument has full scale current of 100 mA. It is converted into a 250V voltmeter by using a series resistance made of a material having negligible resistance temperature coefficient. The meter has a resistance of 320 Ω at 20 °C. After carrying a steady current of 100 mA for a long time, the resistance of the coil increases to 369 due to self heating. When a voltage of 250 V is applied continuously, the error due to self-heating will be nearly.

Question 6

An ammeter whose internal resistance is 50 Ω is used to measure the value of current through a resistance of 500 Ω as shown in the figure. The percentage error in the measurement is (Assume XY is short circuit without connection of ammeter)


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Sep 27ESE & GATE EE