There are two types of electricity: Direct current and alternating current This chapter describes the differences between direct current and alternating current.
2.1 What is direct current?
2.2 What is alternating current?
2.3 Where is direct current made?
2.4 Where is alternating current made?
2.5 Voltage classification
2.6 How direct current is used
2.7 How alternating current is used
2.7.1 Advantages of three-phase alternating current