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Posted Date: 19 Jul 2012      Posted By:: Rajesh    Member Level: Gold    Points: 5 (Rs. 5)

# 2010 Jawaharlal Nehru Technological University, Hyderabad B.Tech Electronic Instrumentation & Control Engineering II B.Tech II Semester Examinations,November 2010 CALIBRATION AND ELECTRONIC MEASUREMENTS SET 1 Question paper

 Course: B.Tech Electronic Instrumentation & Control Engineering University/board: Jawaharlal Nehru Technological University, Hyderabad

Get all the previous year question papers for B.Tech. You can download old question from here.

Univesity Name: Jawaharlal technical University Hyderabad
Paper name: CALIBRATION AND ELECTRONIC MEASUREMENTS (SET 1)
Courses: B.Tech Second year Second semester Examination

II B.Tech II Semester Examinations,November 2010
CALIBRATION AND ELECTRONIC MEASUREMENTS
Electronics And Instrumentation Engineering
SET 1

1. (a) Compare the FFT analyzer with the super heterodyne spectrum analyzer.
(b) Explain the F M method of magnetic tape recording and explain its advantages

2. (a) Explain how a Kelvins double bridge can accurately measure low resistances.
Also derive the condition for balance.
(b) In the Kelvins Bridge shown in gure 5b the ratio of R to R is 2000, R
is 10 and R = 0.2 R . Calculate the value of R.

3. (a) What are the international standards of mass and length?
(b) Distinguish between a primary and secondary standard.
(c) Write short notes on the concept of current standards?

4. A set of independent measurements were made to determine the weight of a lead
shot. The weights in grams were 1.570, 1.597, 1.591, 1.562, 1.577, 1.580, 1.564,
1.586, 1.550, 1.575
Calculate
(a) the arithmetic mean
(b) the deviation from the mean
(c) the average deviations
(d) Standard deviation
(e) Variance
(f) Probable error of one reading
(g) Probable error of mean

5. (a) Explain how the calibration records are maintained?
(b) Write short notes on the process of instrument calibration?

6. (a) With a neat sketch explain the operation of a cavity wave meter.
(b) Explain gating errors and time base errors.

7. (a) Describe the electrostatic focusing system of a CRT.
(b) What is the minimum distance L, that will allow full de
ection of 4 cm at the oscilloscope screen with a de
ection factor of 100 V/cm and with an accelerating potential of 2000 V ?
8. (a) AC basic DArsonal movement with a full scale detection of 50A and internal
resistance of 500 is used as a voltmeter. Determine the value of the multiplier
resistance needed to measure the voltage range of 0-10V?
(b) Explain the performance characteristics of DVMs?

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