Page 903 - Basic Electrical Engineering

13. Explain how displacement can be measured using an inductive transducer.
14. State the difference between a sensor and a transducer. Distinguish between an analog
transducer and a digital transducer.
15. Show how a potentiometric transducer can be used in a measurement system. Mention
advantages and disadvantages.
16. Explain different types of transducers for the measurement of displacement.

Multiple Choice Questions

1. A transducers is a device which

a. transfers a signal from one circuit to the other
b. converts a physical quantity to be measured into an equivalent electrical signal
c. amplifies a signal for the purpose of measuremxent
d. converts an ac signal into a dc signal.

2. Transducers which require external power supply for their operation are called

a. passive transducers
b. active transducers
c. separately excited transducers
d. self-excited transducers.

3. Which of the following is an active transducers?

a. Thermistor
b. LVDT
c. Photo transistor
d. Thermocouple.

4. Sensitivity of a Transducers is

a. the quality of output produced by the transducers
b. the variation of output produced under any disturbed condition
c. the output produced per unit change in the input quantity being measured
d. the correctness of the output produced as a proportion to the input variations.

5. A thermistor is a

a. temperature-dependent resistor mode of connecting material having negative
temperature coefficient of resistance
b. temperature-dependent resister mode of semiconducting of resistance
c. temperature-dependent resistor mode of conducting material having positive
temperature coefficient of resistance
d. temperature-dependent resistor mode of semiconducting material having positive
temperature coefficient of resistance.