sensors and transducers

Function of transducer is to convert

• A. Electrical signal into non electrical quantity

• B. Non electrical quantity into electrical signal

• C. Electrical signal into mechanical quantity

• D. All of these

Potentiometer transducers are used for the measurement of

• A. Pressure

• B. Displacement

• C. Humidity

• D. Both (a) and (b)

Thermistor is a transducer. Its temperature coefficient is

• A. Negative

• B. Positive

• C. Zero

• D. None of these

Strain gauge is a

• B. Passive device and converts electrical displacement into a change of resistance

• C. Passive device and converts mechanical displacement into a change of resistance

• D. Active device and converts electrical displacement into a change of resistance

• A. Active device and converts mechanical displacement into a change of resistance

Inductive proximity sensors can be effective only when the objects are of _____ materials.

• (A) Ferro magnetic

• (B) Diamagnetic

• (C) Paramagnetic

• (D) All of the above

Following acts as detector in Optical sensor

• (A) Light emitting diode

• (B) Photo diode

• (C) Transistor

• (D) All of the above

The linear variable differential transformer transducer is

• A. Inductive transducer

• B. Non-inductive transducer

• C. Capacitive transducer

• D. Resistive transducer

Hall Effect sensors are used in

• (A) Flow meter

• (B) Fuel level indicator

• (C) Both (A) and (B)

• D) None of the above

For the measurement of pressure the instruments used can be

• A. Mechanical

• B. Electro-mechanical

• C. Electronic

• D. All of these

With the increase in the intensity of light, the resistance of a photovoltaic cell

• A. Increases

• B. Decreases

• C. Remains same

• D. None of these