help with phys lab , physics homework help

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i want someone to answer the question for my lab 9 qustions

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Preliminary Questions and Additional Setup
1. Hold the plastic rod containing the magnetic field sensor vertically and move it completely
away from the coil. Click to begin data collection. Rotate the rod around a vertical axis. Look at
the graph. What do you observe? What is causing the variation of field reading?
Answer.
The readings from the magnetic field changes as the sensor is rotated and the cause of this
variation in the reading is because the sensor is detecting different magnetic strengths in
the regions of the Earth’s magnetic field
2. Determine the orientation of the sensor when the magnetic field is at a maximum, and
compare the direction that the dot on the sensor is pointing with the direction that the magnetic
compass needle points. What did you discover? How much does the reading change in one
rotation?
Answer.
When the magnetic field is at maximum, the sensor is facing to the n...


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