Question

list three methods to produce magnetic field

Answer 1

1.Use a permanent magnet.
2.Use an electromagnet.
3.A current carrying coil may also work.

HOPE THIS HELPS

Answer 2

"There are different types of methods available for producing the magnetic field, but three of them are given below.

It includes;

Use the permanent magnets

Charge induced magnetic field

Use the electromagnet

These are the three well-known and popular methods of producing magnetic field.  

When it comes to magnetic field, it is produced when the electric charge actually carries electrons.

"