What is the magnitude of the magnetic field in the region near the outside of the solenoid. State the direction of magnetic field due to current in a toroid.
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It is a well-known fact that the magnetic fields are circles around any wires with the current.
When it comes to the direction of circles, it is based on the overall direction of the current.
Currently, it is simple to guess what actually happens to this magnetic field while we curve the wire into the circle.
After that, we also stack the circles of current to form the cylinder shape.
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