We are using a small compass to map out the magnetic field surrounding a large bar magnet and denote the directions of the field with arrows.
A series of magnetic field lines with direction that point from north pole to south pole around the magnet. We draw three closed loops which one loop enclose no magnetic pole(L1), another loop enclose one of the poles(L2), and another enclose both poles(L3) to show the net flux of each loops. Recorded net flux in each loops on the right side of the picture.
Actual magnetic field produce by the bar magnet.
Activity 2: Calculate the Magnetic Field
Calculate the magnetic field produce by the U-shaped magnet acted on the copper hoop when current going through.
Using experiment data to calculate the magnetic field. We have calculation error in calculating the force which Force in not equal to m*a+I*alpha.
I use the energy method to calculate the magnetic force.
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