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GATE-19: Electrical Measurement & Measuring Instrument Quiz-1 (App update required to attempt this test)

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Question 1

The potential coil of a single phase dynamometer wattmeter has 4840 Ω resistance. Voltage across the load coil is 220 V. With the potential coil connected on the load side, If true power of the load is 100 W. Approximate percentage error due to wattmeter connection is

Question 2

Accuracy is defined as

Question 3

A lissajous pattern on oscilloscope is stationary and has 6 horizontal tangencies and 4 vertical tangencies. The frequency of horizontal input is 1200 Hz. determine the frequency of vertical input.

Question 4

a (0-250)V voltmeter has a guaranteed accuracy of 2% of full scale reading. The voltage measured by the voltmeter is 150 V. Determine limiting error in % for 150 V

Question 5

The following measurements are obtained on a single-phase load:
V=220V1%, I=5.0A1% and W=555W2%. If the power factor is calculated using these measurements, the worst-case error in the calculated power factor in percent is ________.

Question 6

Consider the circuit as shown below. is an unknown impedance and measured as The uncertainties in the value of and are and respectively.

The overall uncertainty in the measured value of is
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Dec 13ESE & GATE EE