Electrical And Electronics Measuring Instruments — Winter 2018

Define the terms.1.Accuracy 2.Precision 3.Sensitivity 4.Resolution

Discuss Extension of range of instruments.

Explain construction working of D’Arsnaval galvanometer. Also derive its torque equation

Explain voltage standards.

Discuss the classification of analog instruments.

With a neat diagram explain 1).construction 2).working, 3).torque equation and 4). Advantages and disadvantages of a PMMC instruments.

Compare moving coil and moving iron instruments.

Explain the construction of multi range ammeter.

Explain construction and working principle of thermocouple instruments.

Explain the construction and working principle of single phase induction type energy meter.

Explain the two watt-meter method for 3-phase power measurement for balanced load.

Explain the need of measuring phase sequence and also explain types of phase sequence indicator.

Discuss applications of DC potentiometer.

Write a short note on digital tachometer

Explain with a neat diagram working of a Synchroscope

Explain the circuit diagram and operation of an Electronic Voltmeter using a differential amplifier

Explain the principle of operation of a power factor meter.