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Author Topic: HALL PROBE  (Read 1553 times)

Offline Gaz

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HALL PROBE
« on: May 31, 2010, 03:55:58 pm »
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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Offline Meticulous

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Re: HALL PROBE
« Reply #1 on: May 31, 2010, 04:00:05 pm »
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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Offline Gaz

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Re: HALL PROBE
« Reply #2 on: May 31, 2010, 04:05:08 pm »
Quote from: ~ A.F ~ on May 31, 2010, 04:00:05 pm
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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Offline Meticulous

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Re: HALL PROBE
« Reply #3 on: May 31, 2010, 04:06:32 pm »
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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Offline Gaz

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Re: HALL PROBE
« Reply #4 on: May 31, 2010, 04:11:01 pm »
Quote from: ~ A.F ~ on May 31, 2010, 04:06:32 pm
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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Offline Dude22

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Re: HALL PROBE
« Reply #5 on: May 31, 2010, 04:43:21 pm »
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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Offline Gaz

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Re: HALL PROBE
« Reply #6 on: May 31, 2010, 04:55:42 pm »
Quote from: Dude22 on May 31, 2010, 04:43:21 pm
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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Offline AndrewCedric

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Re: HALL PROBE
« Reply #7 on: May 31, 2010, 04:55:59 pm »
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

« Last Edit: May 31, 2010, 04:58:52 pm by AndrewCedric »
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Offline Gaz

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Re: HALL PROBE
« Reply #8 on: May 31, 2010, 04:59:46 pm »
Quote from: AndrewCedric on May 31, 2010, 04:55:59 pm
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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Offline AndrewCedric

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Re: HALL PROBE
« Reply #9 on: May 31, 2010, 05:02:50 pm »
Quote from: Gaz on May 31, 2010, 04:59:46 pm
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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Offline Gaz

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Re: HALL PROBE
« Reply #10 on: May 31, 2010, 05:04:37 pm »
Quote from: AndrewCedric on May 31, 2010, 05:02:50 pm
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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Offline crucio

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Re: HALL PROBE
« Reply #11 on: May 31, 2010, 06:47:49 pm »
THIS MIGHT be ov help:
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Offline AndrewCedric

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Re: HALL PROBE
« Reply #12 on: June 01, 2010, 06:57:01 am »
Quote from: crucio on May 31, 2010, 06:47:49 pm
THIS MIGHT be ov help:

THANKS

Helps a lot
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