First, we have a magnetic bar and a compass. We need to drew the direction of the compass around the magnetic bar. As you see, the arrows left from north and go to south.
This picture shows when we connect the arrow together.
Professor put iron powder to the magnetic bar.
There are three loops in the picture, contain one pole, contain both poles and contain no pole.
Professor rub a wire to this magnet and make the wire a magnet.
We used equation to find the magnetic flux.
We found the net flux is always zero.
When we put magnet next to the oscilloscope, the dot will go different direction as the magnet moves.
In this activity, we found out two vectors of points.
We used the equation F=qVB to find the unit for B.
After this activity, we found the magnitude and direction of the force exerted on the proton by the magnetic field.
we could calculate the the force and acceleration by using the equation F=qVB.
We could calculate the radius by using centripetal force.
There is an exercise we did by using the equation r= mv/qB and v = 2πrf to find B.
In this activity, we found the wire will move up and down when professor put a wire between the magnet and connect to a battery.
There are four questions on the lab manual, and answers are:
a. v = L/t
b. I = q/t
c. F = qvB = ILB
d. dF = IdLB
We did an experiment called magnetic force on a current loop.
We have to found the direction of the magnetic field and direction of force.
Then the professor did an experiment and showed the loop will spin 90°.
Conclusion:
Today, we started a brand new chapter; we started to learn magnet. We learned about magnetic field and magnetic force at beginning. We used compass to found the magnetic field and using iron powder to verify. Then we did lots of experiments about magnetic force.
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