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    Could someone please explain in bullet points what needs to be done with the hall probe experiment

    you need a slinky spring, hall probe, ammeter, variable power supply and 2x 0.5 m rulers

    clamp the two rulers firmly - 20 cm apart
    make sure there are 50 slinky turns between them
    Work out turns per unit lenght - 50/0.2 = 250 turns per meter.
    Record flux density of the solenoid for a current of 8A
    Repeat this method using varying turns per unit length.
    plot a graph of Flux density (hall probe reading) against number of turns.

    B= u0nI

    you will get a straight line graph through origin, with grad being u0I

    PS - number of turns can be kept constant and vary current to see if B is proportional to I
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