EIM UNIT 4

The gauge factor of a strain gauge is given by the expression………..

• G=(ΔR/R)/( ΔI/I)

• G=(ΔR/R)

• G=( ΔI/I)

• ALL OF THE ABOVE

Silicon and germanium are used to make………..strain gauges

• semiconductor

• wire

• foil

• all of the above

LVDT stands for………

• Linear voltage differential transformer

• RTD

• Linear variable differential transformer

• Linear voltage derivate transformer

In LVDT, when the core is at the center, the induced emf in the secondary windings are ………

• Positive

• Negative

• Zero

• none of the above

LVDT is ………transducer

• active

• passive

• Self-generative

• none of the above

RTD stands for………..

• Reactance temperature device

• Resistance temperature detectors

• Reactive thermal detectors

• Radioactive thermal detectors

RTD is ………………… transducer

• pressure

• temperature

• displacement

• force

One of the following transducer is a passive transducer

• thermocouple

• piezoelectric

• photovoltaic

• LVDT

…………….is the commonly used metal for RTDs

• platinum

• nickel

• silicon

• germanium

LVDT converts……………… to voltage

• PH

• Light

• Temperature

• Displacement