Finding the magnetic flux density by using an equipment called current blance

this equipment use the principle of moments created by the interaction of the magnetic fields .
Equipment : power supply , multimeter , connecting wires , crocodile clips , current balance , yolk , permanent magnets , balance mass , hall probe .

theory 450 words (outline , hypothesis , how does the theory relate to investigation , prediction of results )
methods 80 words (procedure )
results : table(headings , units , repeats ) , graph(axis labelled ) , calculations(formula , working out ) , errors (calculations , explanation )

modifications 120 words(problems , improvements )

the table :
d1 6 cm I1.9
d27cm I21.367
d38 I31.5
d49 I42.12
d510cm I52.3
d611cm I62.15

where d is the distance , I is the current