In the lab, you will measure the magnetic field inside a large current carrying
ID: 1784948 • Letter: I
Question
In the lab, you will measure the magnetic field inside a large current carrying coil; the figure shows the magnetic field lines in a cross section of such a coil.
Based on the field line pattern, you expect the strength of the magnetic field to be
Question 3 options:
fairly uniform inside and a little stronger near the ends.
increasing linearly along the length of the coil.
decreasing linearly along the length of the coil.
fairly uniform inside and a little weaker near the ends.
fairly uniform inside and a little stronger near the ends.
increasing linearly along the length of the coil.
decreasing linearly along the length of the coil.
fairly uniform inside and a little weaker near the ends.
Explanation / Answer
Answer is fairly uniform inside and a little weaker near the ends.
The magnetic field at any point in space can be computed by summing over the magnetic fields produced by each turn of wire in your solenoid. Inside the coil/solenoid, the field is fairly linear and all the magnetic field lines point in the same direction. This is not the case for the ends, hence it is slightly weaker.
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