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MU Electronics and Telecom Engineering (Semester 3)
Electronic Instruments and Measurements
December 2013
Electronic Instruments and Measurements
December 2013
1
(a)
Draw a block diagram for generalized measurement system and explain its components.
5 M
1
(b)
A strain gauge with gauge factor of 2 is fastened to a metallic member subjected to a stress of 1000kg/cm2. The modulus of elasticity of the metal is 2×106 kg/cm2. Calculate the percentage change in the resistance of the strain gauge? What is the value of Poisons ratio?
5 M
1 (c)
Explain the significance of X-1/2 digitd display
5 M
1 (d)
Describe the various types of sweeps used in CRO
5 M
2
(a)
Compare and explain different types of ADCs
10 M
2
(b)
Draw and Explain the block diagram of general purpose CRO
10 M
3
(a)
Describe how Q-meter is used for the measurement of low impedance. What are the various sources of error in Q-meter?
10 M
3
(b)
Explain with neat diagram the working principle of LVDT. Give its applications.
10 M
4
(a)
what is basic principle of wave analyzer? Explain heterodyne type wave analyzer with application.
10 M
4
(b)
Explain the principle of operation of dual slope DVM.
10 M
5
(a)
Draw and explain the block diagram of DSO.Describe various modes of operation in it.
10 M
5
(b)
Derive an expression for inductance measurement using Hay bridge
5 M
5 (c)
Brief out classification of errors in measurement
5 M
6
(a)
Brief out classification of transducers
7 M
6
(b)
Explain electrodynamometer type wattmeter
7 M
6 (c)
Derive an expression for resistance measurement using Wheatstone bridge.
6 M
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