Skip to content
InsemOct 20242019 patternSE Electrical

Electrical Measurements & Instrumentation (EMI) SPPU Insem Question Paper Oct 2024

All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated EMI questions
Subject code
203144
Pattern
2019 pattern
Exam
Insem
Session
Oct 2024
Max. marks
30
Time
1 Hour
Semester
III
Paper code
[6359]-509

Printed for: S.E. (Electrical Engg.) (Insem)

Instructions to the candidates

  1. Answer Q.1 or Q.2, Q.3 or Q.4.
  2. Neat diagram must be drawn whenever necessary.
  3. Figures to the right indicate full marks.
  4. Assume suitable data, if necessary.

Questions

  1. Q1

    1. a)

      What is meant by static and dynamic characteristics of measuring instruments? Explain the following characteristics. i) Accuracy ii) Speed of response iii) Drifts iv) Linearity

      [7]
    2. b)

      Explain with a neat diagram how CT and PT are used to extend range of ammeter, voltmeter and wattmeter. State the advantages of instrument transformers for range extension.

      [8]

  2. Q2

    1. a)

      Draw a neat schematic diagram of Permanent Magnet Moving Coil type instrument and explain deflecting, controlling and damping system used in it. Comment on scale used in PMMC instrument.

      [7]
    2. b)

      What are the forces needed for satisfactory operation of indicating instrument? Explain how these forces are produced? 2

      [8]

  3. Q3

    1. a)

      A voltmeter of resistance 500 ohm and a milli-ammeter of 1.0 ohm resistance are used to measure a resistance by ammeter voltmeter method. If the voltmeter reads 20V and milli-ammeter reads 100mA. Calculate the true value of resistance i) If the voltmeter is connected across the supply and the milli-ammeter connected in series with the unknown resistance. ii) If the voltmeter is connected across the unknown resistance with ammeter connected on the supply side.

      [7]
    2. b)

      With a circuit diagram derive the equation for an unknown self-inductance measurement using Maxwell’s inductance bridge.

      [8]

  4. Q4

    1. a)

      This part has equations that don’t show as text. Open the PDF to read it.

      [7]
    2. b)

      Draw the circuit diagram of a Kelvin’s Double bridge and derive the condition of balance. … … …

      [8]