Which sentence is opinion rather than fact?
1. humans will never travel to planets around even the nearest stars.
2. when you see the sun, you aren't seeing it as it is.

nambe vazhkaile elam nala irukum

the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).