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+This chapter discusses magnetic fields.
+As in the electric field, there are two measures of the same magnetic field.
+The \\(H\\) field is the direct result of current flow.
+The \\(B\\) field is the force of induction field that operates motors and transformers.
+As in the electric field, the magnetic field is represented by field lines.
+The \\(B\\) field lines are continuous and form closed curves.
+The \\(H\\) field flux lines follow the \\(B\\) field lines but change intensity depending on the permeability of the material in the magnetic path.
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+In this chapter, the movement of electrical energy into inductors or across transformers is discussed.
+This extends the ideas that both fields are need to move energy.
+Both electric and magnetic fields are need in transformers action or to place energy into an inductor.
+It will be shown that iron cores in transformers reduce the magnetizing current so that transformer action is practical at power frequencies.
+The idea that a changing electric field creates both a displacement current and a magnetic field discussed in Chapter 1.
+In this chapter, it is shown that a changing magnetic field produces both an electric field and voltages.
+Both fields must be in transition before an electrical energy can be moved.
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