Instrumentation Transducers

Hall Effect Transducers

Question 1
Marks : +2 | -2
Pass Ratio : 8%
Hall potential is inversely proportional to magnetic flux density.
True
False
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.
Question 2
Marks : +2 | -2
Pass Ratio : 15%
Which of the following represents the correct expression of Lorentz force?
EH/b
eEH/b
eEH
None of the mentioned
Explanation:
Magnitude of Lorentz force will be equal to the ratio of the product of electronic charge and Hall potential with width in meters.
Question 3
Marks : +2 | -2
Pass Ratio : 8%
Hall Effect transducer can be used to measure ___________
Magnetic field
Angular displacement
Linear displacement
All of the mentioned
Explanation:
Hall Effect transducers can be used to measure linear and angular displacement and magnetic field etc.
Question 4
Marks : +2 | -2
Pass Ratio : 15%
Hall Effect is clearly visible in _______________
Pure conductors
Semiconductors
Super conductors
Metals
Explanation:
Hall coefficient depends on the number of free charge carriers and it is clearly visible in semiconductors.
Question 5
Marks : +2 | -2
Pass Ratio : 15%
Which of the following represents correct expression for Lorentz force?
BeV
BV
eV
B
Explanation:
Lorentz force is the product of magnetic flux density, electronic charge and Velocity of charge.
Question 6
Marks : +2 | -2
Pass Ratio : 15%
At equilibrium Lorentz forces will be ____________ of Hall Effect force.
Double
Half
Equal
No proportionality
Explanation:
At equilibrium condition, Lorentz force and Hall Effect force balances each other and they will be equal in magnitude.
Question 7
Marks : +2 | -2
Pass Ratio : 15%
Hall Effect transducers attain equilibrium instantaneously.
True
False
Explanation:
A time delay of 10-14 is required for a Hall Effect transducer to attain equilibrium.
Question 8
Marks : +2 | -2
Pass Ratio : 8%
Which of the following represents the output of Hall Effect transducer?
Hall potential
Emf
Applied voltage
Lorentz Voltage
Explanation:
Output of Hall Effect transducer is called Hall potential and is denoted by EH.
Question 9
Marks : +2 | -2
Pass Ratio : 8%
Hall Effect is a/an _____________
Electronic
Magnetic
Galvanic
Ionizing
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.
Question 10
Marks : +2 | -2
Pass Ratio : 15%
Force exerted by magnetic field in Hall Effect transducers is ____________
Lorentz force
Hall Effect force
Magnetic force
Electric force
Explanation:
Lorentz force is the force exerted by a magnetic field in Hall Effect transducers. On equilibrium condition Lorentz force balances Hall Effect force.