At the end of this lesson you should be able to:

• calculate the inductance of a device of suitable geometry.
• calculate the magnitude and direction of the self induced emf in a circuit containing one or more inductive elements when the current changes with time.
• determione the instantaneous values of the current in an LR circuit while the current is either increasing or decreasing.
• calculate the total magnetic energy stored in a magnetic field.
• calculate the emf induced by mutual inductance in one winding due to a time varying current in a nearby inductor.