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4th Semester / Electrical Engg.
Subject: Electrical Measurements and Measuring Instruments
Time: 3 Hrs. M.M. 100
Instruction Solve All Questions
SECTION-A
Note: Attempt any ten parts. 10x2= 20
Q.1
i) Measurement
ii) Deflecting Torque
iii) The instrument which determines the electrical quantity to be measured directly in term of deflection is called………………………
iv) In which Instruments damping Torque is provided.
v) Millimeter measures……………………
vi) Which instrument has got more resistance voltmeter or Ammeter?
vii) Why the scale of the moving iron instrument is non- uniform?
viii) Define shunts.
ix) What is CT.?
x) Define the phase angle error.
xi) Define Transducer.
xii) Full form of MDI.
SECTION-B
Note: Attempt any Four Questions: 7.5x4=30
Q.2 How ammeter voltmeter & voltmeter are connected in an electric circuit.
Q.3 Explain the Principle of Moving Iron Instruments.
Q.4 Explain the construction & working of Merz Price Demand Indicator.
Q.5 What synchroscope. Write its construction.
Q.6 Draw & explain the block diagram of a digital multimeter.
Q.7 Design a multimeter with ranges of 1A, 5A, 25A & 125A employing individual shunts in each case. The internal resistance of the coil is 730 Ohms with full-scale current 0f 5mA.
SECTION-C
Note: Attempt any Four Questions.: 12.5x4= 50
Q.8 What are the essentials of an indicating instrument?
Q.9 What are the different methods of providing controlling Torque.
Q.10 Explain the construction & working of permanent magnet type moving coil instruments.
Q.11 Explain the principle & construction of earth tester.
Q.12 Explain the measurement of power by two wattmeter method.
OR
Explain the Construction of Cathode Ray Tube/
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