Schematic Symbol

Minute hollow blocks make up the building. Tiny electronic parts are the building blocks of all electronic equipments and appliances.

THE ELECTRON THEORY

The word electricity comes from the Greek word electron, which means amber. The whole effects of electricity take place because of the existence of the electron. While no one has actually seen an electron, but only the effects it produces, we call the laws governing its behavior the electron theory. Electron theory is not only the foundation for the design for all the electrical and electronic equipment. It also gives details on physical and chemical action and helps scientist to investigate into the very nature of the universe and the existence itself.

SAFETY PRECAUTIONS

Safety is everyone’s responsibility. It is the job of everybody in and out of the laboratory to exercise proper precautions and to ensure that no one will be injured and no equipment will be damaged.

Pretest I

Before you keep on reading this module, answer first the pre-assessment test given below to find out what you already understand about the subject.