IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: Gaz on May 31, 2010, 03:55:58 pm
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Anyone know what a hall probe is and how it is to be used? It can turn up in Physics Paper 5.
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A hall probe is a device that is used to measure the magnetic flux density (B) of a magnetic field, either of a magnet (placed perpendicularly to field lines)
or that of current in a conductor.
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A hall probe is a device that is used to measure the magnetic flux density (B) of a magnetic field, either of a magnet (placed perpendicularly to field lines)
or that of current in a conductor.
So it gives a reading in tesla? And any past papers where it has been used?
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Yes. It is connected to a data logger and a computer, and it gives the reading in Tesla.
I do Edexcel, and I have it in past papers. I dont think CIE does.
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Yes. It is connected to a data logger and a computer, and it gives the reading in Tesla.
I do Edexcel, and I have it in past papers. I dont think CIE does.
ah ok thanks. could you link me to a few edexcel past papers that do? and the cie physics syllabus does state that candidates should be able to use one.
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A hall probe was mentioned in my paper 4 this year
LOL
But it didnt need any knowledge of the Hall probe just magentism
I would also like to see which papers have this, so I can get an idea of what they ask ;D
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A hall probe was mentioned in my paper 4 this year
LOL
But it didnt need any knowledge of the Hall probe just magentism
I would also like to see which papers have this, so I can get an idea of what they ask ;D
ur paper 4? cie? if so, which variant?
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It IS in the CIE syllabus.
It is a sliced dope of semi-conductor material.
Why semiconductor??
Cause it will produce a higher Hall Voltage (( Reduce % Error and easier to see ))
Hall Voltage= BI / NQ
N= No. of charge per unit volume.
Sliced Semi Conductor--> lower Charge carrier per unit colume
U must calibrate hall probe and see the rdgs on the Voltmeter.
Place it 90 degrees to the B
The Calibration formula can be given as
B/Bo=V/Vo
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It IS in the CIE syllabus.
It is a sliced dope of semi-conductor material.
Why semiconductor??
Cause it will produce a higher Hall Voltage (( Reduce % Error and easier to see ))
Hall Voltage= BI / NQ
N= No. of charge per unit volume.
Sliced Semi Conductor--> lower Charge carrier per unit colume
U must calibrate hall probe and see the rdgs on the Voltmeter.
The Calibration formula can be given as
B/Bo=V/Vo
Vo being the maximum voltage? im sure we dont need that much detail though.
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Vo being the maximum voltage? im sure we dont need that much detail though.
Initial Voltage. U calibrate with a known magnetic field Bo, it registers Vo.
U do need to know some of its basics to have an idea how to make use of the apparatus.
;) :D :)
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Initial Voltage. U calibrate with a known magnetic field Bo, it registers Vo.
U do need to know some of its basics to have an idea how to make use of the apparatus.
;) :D :)
true true :)
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THIS MIGHT be ov help:
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THIS MIGHT be ov help:
THANKS
Helps a lot