A bugging question: The measurements show that the force is directly proportional to each of the factors B, I and L, in

[answerhappygod]

A bugging question:
The measurements show that the force is directly proportional toeach of the factors B, I and L, in clearly agreeing with thetheoretical expression. But why was the value for the magneticfield of magnet C, as determined from the graphs Force vsCurrent and Force vs Length, so different from themanufacturer’s value? (I am assuming that your measurements were asaccurate as the instruments allowed.)
The answer: The manufacturer provides the strengths of themagnetic field at the center of the face of each magnet. But the magnetic field across the face of a magnet is notuniform, it’s strongest at the middle and decreases towards theedges. So, the wire sits in a magnetic field that decreases towardsboth ends of the wire. What you determine from the slopes of thegraphs is an average magnetic field, that should be smaller thanits strongest strength given by the manufacturer.
Does this make sense for you? If the explanation is right, itshould also explain why the slope of the third graph, Force vsMagnetic Field, came out so far from its theoreticalexpectation. Does it explain it?