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force (f)
magnetic flux density (B) x current (I) x length of conductor in magnetic field (L)
F=BIL
primary and secondary coils
pd across primary coil/pd across secondary coil = turns in primary coil/ turns in secondary coil
pd in primary and secondary coils
pd in primary x current across primary = pd across secondary x current in secondary
there were only three equations for this one lol
willee
Note 
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