Question

define a solenoid with the help of suitable diagram show the pattern of magnetic field lines around a current carrying solenoid state the reason why uniform

Answer 1

A solenoid is a coil wound in the shape of a A solenoid is a long straight cylindrical conductor which is wonded by a number of turns of insulated copper wire.  please refer to page no 229 of NCERT book for the diagram  it almost behaves  like bar magnet and and the magnetic field lines are uniform and parallel inside the solenoid.
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Answer 2

Answer:

a solenoid is a long coil containing a large no of close turns of insulated copper wires.

the pattern of magnetic field around a current carrying solenoid indicates that the strength of magnetic field is the same at all the points inside the solenoid.