GATE 2023 Electrical & Electronic Measurements Rank Booster Quiz 36

A moving iron instrument whose resistance is 40 Ω gives a full-scale deflection with a current of 2 mA . The instrument is to be used with a manganin shunt, to extend its range to 150 mA . Determine the value of shunt resistance required?

For the circuit shown in the figure below. It is desired to find the current in 1 kΩ resistor, by connecting an ammeter across the terminals A-B. What would be the percentage accuracy of measurement in the current flowing in resistor 1 kΩ up to two decimal places.

A balanced three-phase RL connected to a three-phase balanced source 415 V, 50 Hz sequence RYB mains as shown in figure below. The wattmeter reads 5 .196 kW. Then the reactive power absorbed by load is

Which of the following statements is/are correct regarding measurement of power using two wattmeter method?

1). If the power factor is zero, then both the wattmeter shows equal reading.

2). If one of the wattmeters reads twice that of the other, then the power factor is 0.866

3). If the power factor is 0.5, then one of the wattmeters reads zero.

A 230V, 12A, 1– Energy meter makes 216 revolutions in 5 minutes at half load rated voltage and unity p.f. If the meter constant is 2000 rev/kwhr, then determine whether the meter runs faster or slower then actual and also the percentage error?

For measurement of power using two wattmeter method, the reading of this wattmeters are 500 W and 250 W. Find the power factor angle?

DC power is measured using below two configurations.

If the error in measurement of power using these two methods is same, then find the value of R_aR_v (Ω²)?