Positive and negative levels. N is the abbreviation of the English word native, and P is the abbreviation of positive, representing positive and negative respectively. The conductive things in the N material are electrons, and the conductive things in the P material are holes. Plug-in series terminal block: It is a type of terminal block, and it is an electronic component used to realize electrical connection. It is usually used in the distribution box to facilitate wiring, and the power it withstands is generally small.
