# Electrical Measurements Questions and Answers – Transducers

This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Transducers”.

1. How many types of transducers are there?
a) 2
b) 4
c) 6
d) 8

Explanation: There are basically two types of transducers. They are as follows:
i) Mechanical
ii) Electrical.

2. Mechanical transducers sense __________
a) electrical changes
b) physical changes
c) chemical changes
d) biological changes

Explanation: A mechanical transducer senses the changes in a system’s physical condition and gives an output. When a bimetallic strip is subjected to changes in temperature, the output is the displacement of the strip mechanically.

3. Mechanical transducers generate ________
a) electrical signals
b) chemical signals
c) physical signals
d) biological signals

Explanation: Mechanical transducers in general portray physical or mechanical signals at the output in response to any physical changes in a system.

4. Electrical transducers generate ________
a) biological signals
b) chemical signals
c) physical signals
d) electrical signals

Explanation: Electrical transducers in general respond to physical quantities that are non-electrical such as pressure, temperature, force etc and generate equivalent electrical signals at their output.

5. Electrical signals are easy to amplify.
a) True
b) False

Explanation: Electrical signals are easier to either amplify or attenuate. By making use of static devices such as FGK, electrical signals can be brought to a suitable level.
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6. The power needs of electrical transducers is ________
a) maximum
b) minimum
c) zero
d) infinite

Explanation: Electrical transducers have very minimum power requirements. Electrical transducer based systems are controlled with a small amount of power.

7. Electrical transducers are ________
a) small and non-portable
b) large and non-portable
c) small and compact
d) large and portable

Explanation: Electrical systems have integrated circuits that are small and compact. They can be easily ported as well.

8. Mechanical transducers cause ________
a) power loss
b) hysteresis loss
c) eddy current loss
d) frictional loss

Explanation: Mechanical transducer based systems are affected by the frictional loss of the rotating parts. In electrical transducers, there is no wear and tear due to non moving parts.

9. Electrical transducers are costly.
a) True
b) False

Explanation: Electrical transducers are very expensive in nature. The ageing and drift of the various electronic components act as an overhead in the use of electrical transducers on a large scale.

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