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Thapar University 2006 B.Tech Electrical and Electronics Engineering Elements

Thursday, 18 April 2013 10:35Web

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Thapar Institute of Engineering & Technology
B.Tech Electrical & Instrumentation (3rd Year)
Final Term exam
EI004 (Elements & Analysis of Instrumentation Systems)

THAPAR INSTITUTE OF ENGINEERING & TECHNOLOGY, PATIALA END SEMESTER EXAMINATION

Subject: EI-004, Elements and Analysis of Instrumentation Systems (Third year B.E.(EIC))

Course Faculty: Dr. Yaduvir Singh Maxm. Time: Three Hours Maxm. Marks: 36

.Sole: Attempt any six (06) questions. All questions carry equal marks. Support your answers with the practical cases, characteristic plots etc., if applicable. Make suitable assumptions, if required.

Q. No. 1:

Explain concept of stiffness. What are the conditions for maximum power transfer in an instrumentation? Obtain transfer function of the following circuit.

Q. No. 2:

What is meant by dynamic response? Obtain (derive and plot) unit step input response of a generalized second order measurement device.

Q.No.3:

Explain the concept of dead time. A first order measurement device has following open loop transfer function. _

x- -is

<$(& - ___

C l+i>^s)

Derive and plot its open loop time response for the unit step input.

Q. No. 4:

Write technical notes on the following. Support your answer with neat sketches and relevant details.

(a) LED and LCD

(b) Fiber Optical Sensor

Q. No. 5:

What are discrete data systems? Mention an example of it with suitable sketches. Obtain Z-transform of analog signal f (t + nt).

Q.No.6:

Explain narrow band pass filter (op-amp based) using multiple feedback. Derive and obtain its transfer function.

Q.No.7:

Write a Fourier series approximation for the function as given below, such that the error is zero at t 0, T/3, T/2, 2T/3 and T. Draw the approximate function thus obtained. If this function is used as an input signal to a second order instrument with = 10 rad/sec, = 0.3, K* 5 mV/mm, find the steady state output of the instrument. (All notations carry standard meaning.)