Fundamentals of Electricity – Final Exam Study Guide Graded A+

True - ANSWER-T or F: Matter has mass and occupies space. False - ANSWER-T or F: Matter can exist in only two states: solid or liquid. unidirectional - ANSWER-Direct current is described as _______________. bidirectional - ANSWER-Alternate current is described as ______________. Direct - ANSWER-What type of current flows in only one direction? Alternate - ANSWER-What type of current reverses its direction of flow at regular intervals? 1,000 - ANSWER-The Greeks were the first to discover electricity about ______ years ago. Repulsion - ANSWER-What force is demonstrated in objects with like charges? Attraction - ANSWER-What for is demonstrated in objects with unlike charges? An atom - ANSWER-What is the smallest part of an element that still retains the properties of that element? Proton Neutron Electron - ANSWER-What are the three principle parts of an atom? Proton - ANSWER-What part of an atom has a positive charge? Neutron - ANSWER-What part of an atom has no charge? Electron - ANSWER-What part of an atom has a negative charge? neutrons and protons - ANSWER-The nucleus of an atom contains _________. Protons - ANSWER-The atomic number of an element is the number of _____ in the nucleus. repel attract - ANSWER-A basic law of physics states that like charges ________ and opposite charges ___________. outer - ANSWER-The valence shell of an atom is the _________ shell. 8 - ANSWER-What is the maximum number of valence electrons in an atom? one and three - ANSWER-A conductor is made from a material that contains between __________________ valence electrons. electrons - ANSWER-Electrical current is the flow of ________________. seven or eight - ANSWER-An insulator is a material containing _________ valence electrons. four - ANSWER-A semiconductor contains _______ valence electrons. Magnetism - ANSWER-What is the most common method of producing electricity? bump - ANSWER-The theory stating that current flow is produced when an electron from one atom knocks electrons of another atom out of orbit is generally called the _______________ theory. molecule - ANSWER-The smallest part of a compound that still remains the properties of that compound is a(n) __________. photons - ANSWER-Producing electricity from light involves the use of particles called ____________. True - ANSWER-T or F: The grounding conductor helps prevent a shock hazard in the event that an ungrounded, or hot, conductor comes in contact with the case or frame of an appliance. False - ANSWER-T or F: During normal operation a typical 120 V appliance circuit, current flows through the hot, grounding, and neutral conductors. True - ANSWER-T or F: The grounding prong of a plug should never be cut off or bypassed. False - ANSWER-T or F: Voltage flows through an electric circuit like water flows through a pipe. Coulomb's Law - ANSWER-What law states that the force of electrostatic attraction or repulsion is directly proportional to the product of the two charges and inversely proportional to the square of the distance between them? ampere - ANSWER-One coulomb per second is equal to one _________.