Explanation:

The magnetic field inside a long straight solenoid carrying current is uniform at all points. The magnetic field is the area around a magnet in which there is magnetic force. Moving electric charges can make magnetic fields. Magnetic fields can usually be seen by magnetic flux lines. At all times the direction of the magnetic field is shown by the direction of the magnetic flux lines. A smaller magnetic field unit is the Gauss (1 Tesla = 10,000 Gauss).