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To calibrate an uncalibrated Hall probe and use it to investigate how the magnetic flux density mid-way between opposite poles of two permanent bar magnets varies with the separation of the bar magnets.
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Physics Practical Examination 2 (Part A - Planning Exercise) The aim of this experiment is to calibrate an uncalibrated Hall probe and use it to investigate how the magnetic flux density mid-way between opposite poles of two permanent bar magnets varies with the separation of the bar magnets. To initially calibrate the Hall probe, a solenoid will be used to create a uniform magnetic field and the Hall probe will be placed in the centre of the solenoid. The magnetic flux density at this point can be calculated using an equation: B = µ0 N I i where B is the magnetic flux density, µ0 is the permeability of free space, N is the number of coils per metre and I is the current applied to the solenoid. At a number of different applied currents (five or more readings), along with calculating the magnetic flux density the Hall voltage should also be noted (a...
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