This set of Basic Electronics Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Types of Transducers”.
1. The transducer that gives electric energy as output is known as ________
a) Electrical transducer
b) Electronic transducer
c) Chemical transducer
d) Mechanical transducer
View Answer
Explanation: A transducer is a device that converts the energy from one form to another. If the transducer converts the energy into the electrical energy then it is called called as the electrical transducer.
2. Self generating type transducers are ________
a) Passive type transducers
b) Active type transducers
c) Electrical transducers
d) Chemical transducers
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Explanation: The active type transducers are self generating type. They develop their own voltage of the current as their output signal. The energy required for the generation of this output signal is by using a physical phenomena or by using detectors.
3. The input and output characteristics of the transducer must be_________
a) Non-linear
b) Undefined
c) Parabola
d) Linear
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Explanation: The transducer have some properties. One among them is the linearity property. It states that the input and output of the transducer must be linear that means it must be in a constant increasing or decreasing fashion.
4. The transducer must have ruggedness.
a) True
b) False
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Explanation: The transducer must have the property of ruggedness. It means the transducer must with stand when the high loads are applied. It is mainly considered as a preventive method because having ruggedness will help in preventing the transducers.
5. Which of the following states that the transducer must produce the identical output signal for the same values?
a) Reliability
b) Dynamic response
c) Repeatability
d) Ruggedness
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Explanation: Repeatability states that the transducer have to produce the identical output when the same input signal. The number of times the same input signal is applied, every time it must show the same output under same environmental conditions.
6. The transducer must have__________
a) High stability
b) High intensity
c) Low stability
d) No stability
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Explanation: The transducer must have high stability. The transducer must not be affected by the temperature, vibration and also the other environmental conditions. There must be minimum errors in the measurements.
7. In aerospace, the input must be ________in nature.
a) Static
b) Dynamic
c) Friction
d) Reliable
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Explanation: In industries. Aerospace and biological applications, the input is not in static nature. It is in dynamic in nature. It means the input varies with time and the transducer must respond accordingly to the variation of input with time. This property is called as the good dynamic response.
8. The transducer must produce high________
a) Output
b) Input
c) Analog output
d) Mechanical output
View Answer
Explanation: The transducer must produce high analog output with high signal to noise ratio. So, that the output can be measured directly or after suitable amplification. It must be easy to instrumentation.
9. The transducers under working conditions will be subjected to various ______
a) Electrical stress
b) Electrical strain
c) Mechanical stress
d) Mechanical strain
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Explanation: The transducers under working conditions will be subjected to mechanical strains. Such external sources must not introduce any deformity and affect the performance of the transducers.
10. Which of the following is the active transducer?
a) Thermocouple
b) Resistance
c) Thermistor
d) Capacitance
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Explanation: Thermocouple is the active transducer as it produces the output by itself or by physical phenomena. The resistance, capacitance and the thermistor are the passive transducer as they cannot produce the output by their own and depends on external sources.
11. The capacitance of the parallel plate capacitor is given by__________
a) Ɛ0A/d
b) d/Ɛ0Ɛr
c) Ɛ0ƐrA/d
d) ƐrA/d
View Answer
Explanation: The capacitance of the parallel plate capacitor is given by Ɛ0ƐrA/d. Here, Ɛ0=dielectric constant, Ɛr=relative dielectric constant, A=area of the parallel plates in and d is the distance between the parallel plates.
12. The variation in capacitance because of variation in ______
a) Dielectric
b) Relative dielectric
c) Increase in temperature
d) Area of parallel plates
View Answer
Explanation: AS per the formula of capacitance of the parallel plate capacitor, we know that the capacitance is directly proportional to the area of the parallel plates and inversely proportional to the
Distance between the parallel plates. So, change in A or d will vary the capacitance. Dielectric and relative dielectrics are constants.
Sanfoundry Global Education & Learning Series – Basic Electronics Engineering.
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