Reg No.:

Course Name: MEASUREMENTS AND INSTRUMENTATION
Max. Marks: 100

10

Answer any one full question from each module. Each question carries 14 marks

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11(b)
12(a)

12(b)

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0800EET203122003 Pages: 2

Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Third Semester B.Tech Degree Examination December 2020 (2019 Scheme)

Course Code: EET203

PARTA
Answer all questions. Each question carries 3 marks

Explain the significance of measurements.
How drift affects the input-output relationship?
The deflection produced by an Electrodynamometer wattmeter 15
proportional to the power being measured. Justify with necessary equations.
In single phase induction type Energy meter, why shunt magnet flux should
be in exact quadrature with the applied voltage. How this is made possible?
Explain any one method to measure the leakage resistance of capacitor.
Construct a bridge circuit to measure the frequency in audio and high
frequency oscillators.
What are the principal requirements in magnetic measurements?
With neat circuit explain the characteristics of photodiode.
What is lissajous pattern and how does it vary with phase shift.
List the merits and demerits of LVDT.

PART 13

Module 1
What is controlling force? Explain the various controlling systems used in an
indicating instrument?
Explain the various methods for producing damping torque with neat figures.
With neat sketches explain the construction of a PMMC instrument.
“PMMC instruments have uniform linear 5081௦”. Justify.

Module 2
Derive the expression for transformation ratio and phase angle error of a

potential transformer using its equivalent circuit and phasor diagram.

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Duration: 3 Hours

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