What is a solenoid? Sketch magnetic field lines produced around a current-carrying solenoid. Mark the region where the field is uniform. Compare its field with that of a bar magnet.

(N/A) solenoid is a coil of many circular turns of insulated copper wire wrapped closely in the shape of a cylinder.
The magnetic field lines around a current-carrying solenoid are similar to those of a bar magnet. The field lines emerge from one end and enter the other,forming closed loops.
The magnetic field is uniform inside the solenoid,which is represented by parallel field lines along the axis of the solenoid.
Comparison with a bar magnet:
$1$. The magnetic field pattern of a current-carrying solenoid is identical to that of a bar magnet.
$2$. One end of the solenoid behaves like the North pole $(N)$,and the other end behaves like the South pole $(S)$.
$3$. Like a bar magnet,the field lines outside the solenoid go from the North pole to the South pole,and inside,they go from the South pole to the North pole.