 B.E. Electrical & Electronics Measurement-December 2019 - Grad Plus

# B.E. Electrical & Electronics Measurement-December 2019

## Semester: 3

[Total Time: 3 Hours]
[Total Marks: 80 M]
Note: 1) Question No.1 is compulsory.
2) Attempt any three questions out of remaining five question.
3) Assume suitable data if required.

Q.1. Solve any four

A. Explain galvanometer used as a detector in d.c. bridge. [5M]

B. Write short note on Extension range of ammeter [5M]

C. Explain resolution and sensitivity of digital meters. [5M]

D. How digital meters are advantageous over analog meters? [5M]

E. Differentiate between active and passive transducers. [5M]

Q.2 (A) Write short note on Production of controlling torque through spring control method. [10M]

(B) Why synchro scope is required? Explain with neat diagram we stone type synchro scope. [10M]

Q.3 (A) Describe construction and working principle of moving iron instrument and hence derive the torque equation. [10M]

(B) Explain with block diagram ramp type digital voltmeter.[10M]

Q.4 (A) Explain a suitable bridge to measure Low Resistance. [10M]

(B) Explain with phasor diagram how Schering bridge can be used to measure unknown
capacitor. [10M]

Q.5 (A) Draw circuit diagram and explain Maxwell’s bridge. [10M]

(B) Explain the construction and working of thermocouple. also mention the advantages and disadvantages. . [10M]

Q.6.(A)Explain how Crompton’s type potentiometer can be used for calibration of voltmeter . [10M]

(B) Explain Anderson bridge for measuring self inductance. Draw neat circuit diagram and phasor diagram. [10M]

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