Electronics ETA Certification Practice Exam Questions and Answers

The "triboelectric effect" causes what kind of electricity? Static The law of static electrical charges states: like charges repel Minute particles that make up all possible elements and still retain the unique chemical characteristics of the element are called _____________. Atoms A molecule is the smallest particle of matter that can exist by itself. (1) True (1) A basic atom must contain what two types of subatomic particles? Electron and proton An electron has _______________. a Negative charge What two types of energy are used throughout electronics? Kinetic and potential Electrical direct current flowing in a wire produces a magnetic field: at right angles to current flow A material is magnetized when the: domains are in alignment A material that can be magnetized easily falls into this category: Ferromagnetic Invisible lines of force that surround a magnet are called ___________________. magnetic flux lines The pole of a magnet from which flux leaves is called the __________________. north _________________ force produces magnetic flux. Magnetomotive What class of fire extinguisher is used on an oil fire? B It is dangerous to use wooden handled tools around high voltage due to their ability to absorb moisture. (2) True (2) In order to eliminate possible fire hazards, rags should be stored in ________________ metal containers