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Test: Transducers- 5 - GATE MCQ


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25 Questions MCQ Test - Test: Transducers- 5

Test: Transducers- 5 for GATE 2024 is part of GATE preparation. The Test: Transducers- 5 questions and answers have been prepared according to the GATE exam syllabus.The Test: Transducers- 5 MCQs are made for GATE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Transducers- 5 below.
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Test: Transducers- 5 - Question 1
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A capacitive transducer works on the principle of ________.

Detailed Solution for Test: Transducers- 5 - Question 1
A capacitive transducer works on the principle of capacitance. The capacitance of a system depends on the dielectric used and the properties of a capacitive system.
Test: Transducers- 5 - Question 2
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Which of the following represents the drawback of the inductive transducer for displacement measurement?

Detailed Solution for Test: Transducers- 5 - Question 2
Electromagnetic force of attraction is acted on moving core, and hence displacement source has to overcome this force.
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Test: Transducers- 5 - Question 3
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Which of the following parameters can’t be found with the Hall Effect?

Detailed Solution for Test: Transducers- 5 - Question 3
The Hall Effect is used to find whether the semiconductor is of n-type or p-type, mobility, conductivity, and carrier concentration.
Test: Transducers- 5 - Question 4
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Capacitance can be varied in ________.
Detailed Solution for Test: Transducers- 5 - Question 4
Capacitance is varied in four ways.

They are as follows:

  • Change of distance

  • Change in dielectric

  • Change in common plate area

  • Using quartz diaphragms

Test: Transducers- 5 - Question 5
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In the Hall Effect, the electric field is in the x-direction, and the velocity is in the y-direction. What is the direction of the magnetic field?
Detailed Solution for Test: Transducers- 5 - Question 5
The Hall Effect satisfies Lorentz’s Force which is E = v x B

So, the direction of the velocity, electric field, and magnetic field should be perpendicular to each other.

Test: Transducers- 5 - Question 6
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Calculate the hall voltage when the Electric Field is 5V/m and the height of the semiconductor is 2cm.
Detailed Solution for Test: Transducers- 5 - Question 6
Vh = E * d

= 5 * 2/100

= 0.1V.

Test: Transducers- 5 - Question 7
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Which of the following is correct for toroid-type coils?
Detailed Solution for Test: Transducers- 5 - Question 7
Toroid cannot measure linear displacement due to its shape.
Test: Transducers- 5 - Question 8
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Calculate the Hall Effect coefficient when the number of electrons in a semiconductor is 1020.
Detailed Solution for Test: Transducers- 5 - Question 8
R = 1 / ρ

= 1 / (1.6 * 10-19 * 1020)

=0.0625.

Test: Transducers- 5 - Question 9
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What is the conductivity when the Hall Effect coefficient is 5 and mobility is 5cm2 /s.
Detailed Solution for Test: Transducers- 5 - Question 9
µ = σR

σ = µ / R

= 5 * 10-4/5

= 0.0001 S/m.

Test: Transducers- 5 - Question 10
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In the Hall Effect, the directions of the electric field and magnetic field are parallel to each other.

The above statement is:
Detailed Solution for Test: Transducers- 5 - Question 10
To make Lorentz force into the effect, the electric field and magnetic field should be perpendicular to each other.
Test: Transducers- 5 - Question 11
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What is the velocity when the electric field is 5V/m and the magnetic field is 5A/m?
Detailed Solution for Test: Transducers- 5 - Question 11
E = v x B

v = E / B

= 5 / 5

= 1m/s.

Test: Transducers- 5 - Question 12
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Which of the following represents materials used for thickness measurement using an inductive transducer?
Detailed Solution for Test: Transducers- 5 - Question 12
Commonly, all magnetic materials can be used for thickness measurement using inductive transducers.
Test: Transducers- 5 - Question 13
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Inductive potentiometers are used to measure ________________.
Detailed Solution for Test: Transducers- 5 - Question 13
It has the same function as linear potentiometers and is used for measuring displacement.
Test: Transducers- 5 - Question 14
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Capacitive transducer displays ________.
Detailed Solution for Test: Transducers- 5 - Question 14
A capacitive transducer displays non-linear behavior. This is due to stray electric fields. Guard rings must eliminate the edge effects and the parasitic electric field effects.
Test: Transducers- 5 - Question 15
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Which of the following device can be used for measuring relative angular displacement between two systems?
Detailed Solution for Test: Transducers- 5 - Question 15
Synchro is a device used for measuring angular displacement between two systems, usually in a machine between two shafts.
Test: Transducers- 5 - Question 16
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Push-pull coil system is used for ________________.
Detailed Solution for Test: Transducers- 5 - Question 16
Push-pull system is a particular type of coil system with many advantages.
Test: Transducers- 5 - Question 17
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Which of the following formulae doesn’t account for correct expression for J?
Detailed Solution for Test: Transducers- 5 - Question 17
B = µH

So, option d is correct option.

Test: Transducers- 5 - Question 18
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Calculate the Hall voltage when B = 5A/m, I = 2A, w = 5cm and n = 1020.
Detailed Solution for Test: Transducers- 5 - Question 18
Vh = BI / wρ

= 5 = 2 / (5 * 10-2 * 105 * 1.6 * 10-19)

= 0.002V.

Test: Transducers- 5 - Question 19
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In Hall Effect, the electric field applied is perpendicular to both current and magnetic field?
Detailed Solution for Test: Transducers- 5 - Question 19
In Hall Effect, the electric field is perpendicular to both current and magnetic field so that the electric field or vice versa can balance the force due to magnetic fielders.
Test: Transducers- 5 - Question 20
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Which of the following represents the application of inductive transducers?
Detailed Solution for Test: Transducers- 5 - Question 20
Inductive transducers can measure displacement and thickness of thin plate etc.
Test: Transducers- 5 - Question 21
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Which of the following is correct for synchro?
Detailed Solution for Test: Transducers- 5 - Question 21
They develop induced emf related to the angular position of the rotor. Hence they are known as transformer type displacement transducer.
Test: Transducers- 5 - Question 22
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For thickness measurement, the material should have constant permeability and resistivity.
Detailed Solution for Test: Transducers- 5 - Question 22
Material used for thickness measurement should have constant permeability and resistivity since material properties should not change during measurement.
Test: Transducers- 5 - Question 23
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Frequency response of capacitive transducers is ________.
Detailed Solution for Test: Transducers- 5 - Question 23
In a capacitive transducer, long leads and cables are used. Due to the loading effect, frequency response is inadequate, and the sensitivity reduces.
Test: Transducers- 5 - Question 24
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What is the relation between capacitance and input impedance?
Detailed Solution for Test: Transducers- 5 - Question 24
Capacitive transducer has high input impedance. It also has a good frequency response. The loading effects are minimum.
Test: Transducers- 5 - Question 25
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Composite capacitance consists of _________.
Detailed Solution for Test: Transducers- 5 - Question 25
There is more than one dielectric medium in a composite capacitance. The capacitance is given by

where d1, d2, and d3 are the thicknesses

∈1, ∈2, and ∈3 are the permittivities of the three different media.

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