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GATE 2022 : Measurements Quiz- 76

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Question 1

Output reading of moving iron ammeter for sawtooth wave having maximum value of 400 A and 10 × 10–3 sec time period is ______ A .

Question 2

The value of limiting error in measurement of resistance is ± _____%, if timing error of power and current measurement is 2.5% and 1.25% respectively.

Question 3

For a PMMC type instrument, consider the following parameters:

Full scale deflection = 50 μA

Meter resistance = 1000 Ω

This PMMC is employed as voltmeter with 60 V range. Then the value of multiplier resistance is ________kΩ.

Question 4Multiple Correct Options

For moving coil instrument, carrying a current of 10 mA. Consider the following parameters:

Flux Density = 0.1 Wb/m2

Depth of coil = 30 × 10–3 m

Width of coil = 20 × 10–3 m

Number of turns = 100

Control spring constant = 2 × 10–6 Nm/degree

Then Choose the correct option(s):

Question 5Multiple Correct Options

For a balanced 3-phase circuit, two-wattmeter method shows W1 and W1/4 values. If W1 = 2000 Watts, then choose the correct option(s):

Question 6

In the above figure load is supplied through a 440 V, 50 Hz, 3 phase balanced supply. the current coil of the wattmeter is connected in the branch in between R and Y phase also the pressure coil of the wattmeter is connected in between Y and b phase. The phase sequence is RYB, find the reading of the wattmeter for the connection shown in figure below:

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Sep 9ESE & GATE EE