Question

how the magnetic field inside a solenoid is uniform
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Answer 1

$\huge\underline\orange{\mathcal Answer}$

Solenoid consists of a length of insulated wire coiled into a cylinder shape. Current in solenoid produces a stronger magnetic field inside the solenoid than outside. The field lines in this region are parallel and closely spaced showing the field is highly uniform in strength and direction.

Answer 2

Answer:

when we flow the electrons via solenoid the similar resistance insulated wire caught its magnetic field for as time as the electrons flow through it.