What is a solenoid? Draw magnetic field lines due to a current carrying solenoid.
The solenoid is a long coil containing a large number of close turns of an insulated wire. This is a coil wound in the shape of a helix. The magnetic field produced by a current carrying solenoid is similar to the magnetic field produced by a bar magnet.
The given diagram shows the produced magnetic field lines when a current flows through a solenoid. The field lines are parallel inside (indicating that the magnetic field is uniform inside the solenoid) and curved outside the solenoid.