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0800EET203122003

Explain the various errors in electrodynamometer type wattmeter.
With neat circuit show that the deflection produced by a wattmeter is
proportional to the power consumed in the circuit.
Module 3
Explain how low resistance is measured using kelvins Double Bridge
method. Derive the balance equation used.
Explain any one method used for the measurement of earth resistance. What
are the factors on which the resistance of earthing system depends?
Explain how relative permittivity can be measured using Schering Bridge.
With neat circuit diagram and phasor explain how capacitance is measured
using Schering Bridge. What is dissipation factor and derive its equation.
Module 4
Explain with figure how BH Curve and Hysteresis loop can be determined
using step by step method.
List the salient features of thermistors.
What are thermal sensors? Explain any three thermal sensors. With neat
circuit show how temperature is measured using thermocouple. List the
merits and demerits of using Thermocouple.
What is photovoltaic cell? Explain its construction and characteristics with
neat figure.
Module 5
Briefly explain LVDT with neat figures. What are the merits and demerits of
LVDT? Also list down any two applications.
Describe Digital Multimeter.
With neat block diagram explain a general purpose oscilloscope.

How frequency and phase is measured using Lissajous pattern.

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