If you grip your right hand like this, then your thumb points in the direction of the current and you fingers show the direction of the magnetic field. This is called the right hand rule. Solenoids ...

12.2.2 Right-Hand Thumb Rule. 12.2.3 Magnetic Field due to a Current through a Circular Loop. 12.2.4 Magnetic Field due to Current in a Solenoid. 12.3 Force on a Current-Carrying Conductor in a ...