This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on ” Hall Effect Transducers”.
1. Hall Effect is a/an _____________
a) Electronic
b) Magnetic
c) Galvanic
d) Ionizing
View Answer
Explanation: Hall Effect is due to the interaction of the magnetic field and moving electric charge which results in the development of forces that alter the motion of charge.
2. At equilibrium Lorentz forces will be ____________ of Hall Effect force.
a) Double
b) Half
c) Equal
d) No proportionality
View Answer
Explanation: At equilibrium condition, Lorentz force and Hall Effect force balances each other and they will be equal in magnitude.
3. Which of the following represents the correct expression of Lorentz force?
a) EH/b
b) eEH/b
c) eEH
d) None of the mentioned
View Answer
Explanation: Magnitude of Lorentz force will be equal to the ratio of the product of electronic charge and Hall potential with width in meters.
4. Hall potential is inversely proportional to magnetic flux density.
a) True
b) False
View Answer
Explanation: Hall potential is always directly proportional to magnetic flux density. Expression is given as EH=BbV; where b is the width and V represents velocity.
5. Hall Effect is clearly visible in _______________
a) Pure conductors
b) Semiconductors
c) Super conductors
d) Metals
View Answer
Explanation: Hall coefficient depends on the number of free charge carriers and it is clearly visible in semiconductors.
6. Force exerted by magnetic field in Hall Effect transducers is ____________
a) Lorentz force
b) Hall Effect force
c) Magnetic force
d) Electric force
View Answer
Explanation: Lorentz force is the force exerted by a magnetic field in Hall Effect transducers. On equilibrium condition Lorentz force balances Hall Effect force.
7. Which of the following represents correct expression for Lorentz force?
a) BeV
b) BV
c) eV
d) B
View Answer
Explanation: Lorentz force is the product of magnetic flux density, electronic charge and Velocity of charge.
8. Which of the following represents the output of Hall Effect transducer?
a) Hall potential
b) Emf
c) Applied voltage
d) Lorentz Voltage
View Answer
Explanation: Output of Hall Effect transducer is called Hall potential and is denoted by EH.
9. Hall Effect transducers attain equilibrium instantaneously.
a) True
b) False
View Answer
Explanation: A time delay of 10-14 is required for a Hall Effect transducer to attain equilibrium.
10. Hall Effect transducer can be used to measure ___________
a) Magnetic field
b) Angular displacement
c) Linear displacement
d) All of the mentioned
View Answer
Explanation: Hall Effect transducers can be used to measure linear and angular displacement and magnetic field etc.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
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