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GATE 2022 : Electrical Measurement Quiz 2

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Question 1

Uniformity in the scale of an ammeter indicates that it is?

Question 2

Consider the following statements regarding PMMC instruments

1. Power consumption is less

2. Torque-weight ratio is low

3. The scale is uniformly divided

4. Measure AC as well as DC quantities

Which of the above statements are correct?

Question 3

A PMMC instrument with coil dimensions of 15mm × 10mm, flux density of 1.8 × 10–3 wb/m2 and the spring constant of 0.1 × 10–6 N-m/degree is used. What will be the number of turns required if a current of 6mA produces an angular deflection of 92° ?

Question 4

Three 100 V full scale PMMC DC voltmeter have figure of merit 3 K/V, 6 K/V and 9 K/V respectively. The series combination of these voltmeter can measure a maximum a DC voltage equal to

Question 5

What will be the reading of PMMC instrument if the below mention waveform is passed through it ?

Question 6

A PMMC type instrument with its full scale reading of 6mA and 8mV potential difference is used as voltmeter in order to measure the voltage of 0 – 300V. The series resistance is required in order to have safe operation is  _________Ω
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