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The direction of the magnetic field at a point in space is indicated by the compass magnet. Now place one magnet on the marked space below and identify north and south poles of the magnet. Explain how the poles interact in terms of attraction and repulsionĢ. Take the two bar magnets out of the box and investigate their interaction. Then we will measure the magnetic field ofa bar magnet and an electromagnet using PASCO magnetic field sensor and study how the magnetic field depends on position, current, etc. Here in this experiment we qualitatively investigate the magnetic field around a bar magnet (permanent magnet) and an electromagnet using a tiny test magnet called a "compass".
![pasco capstone search point in graph pasco capstone search point in graph](https://s2.studylib.net/store/data/018492272_1-80b7b120f6a086ccfa6494e87977f96a-768x994.png)
However, in magnets we only find magnetic dipoles in nature where we always find a "north pole" and "south pole" together. We learned that positive and negative electric charges can be separated and monopoles and dipoles occur naturally. The horizontal component of the earth magnetic field is about 50 microtesla on the surface of the earth. Small magnetic fields like the magnetic field of a small bar magnet are measured in millitesla. "Tesla" is a large unit with one Tesla being a very strong magnetic field. Therefore magnetic field is a vector quantity. Similarly we use the magnetic field model to explain how a magnet exerts forces on other magnets and charges moving relative to the field. We used the electric field model to explain how a charge or a charge distribution exerts forces on other charges at a distance. Magnets and electromagnets produce magnetic fields. Electric charges produce electric fields. Transcribed image text: Apparatus: Bar magnet box, compass, PASCO magnetic field sensor, USB wire, PASCO interface, multimeter, power supply, red and black leads and alligator clips, rheostat.