Question

inside the solenoid the magnetic field is uniform or non-uniform ?

Answer 1

The magnetic field inside a solenoid is UNIFORM and Straight lines.

Answer 2

The force of a magnetic field is maximized when the current moves perpendicularly to the field lines, but is zero when it moves parallel to it; therefore, we can assume that in a solenoid the magnetic field is essentially uniform or constant because the wires are nearly parallel.

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