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