NCCER Electrical Module 26103-20 Questions And Verified Correct Answers

NCCER Electrical Module 26103-20 Questions And Verified Correct Answers An electrical circuit contains, at minimum 3 components to carry the electrical current. The circuit should also have a means to stop and start the current, such as a switch. - Answer -Voltage source, a load and conductors (wires) The atom is the smallest part of an element that enters into a chemical change, but it does so in the form of a _____ particle. - Answer -Charged The term ___ can be taken to mean a quantity of electricity that is either positive or negative. - Answer -Charge A hydrogen atom is composed of a nucleus containing one proton and a single orbiting electron. As the electron evolves around the nucleus, it is held in this orbit by two counteracting forces. One of these forces is called ___ force, which is the force that tends to cause the electron to fly outward as it travels around its circular orbit. The second force acting upon the electron is ___ force, which pulls the electron towards the nucleus. - Answer -Centrifugal, Electrostatic A proton (+) ____ another proton (+) - Answer -Repels An electron (-) ___ another electron (-) - Answer -Repels A proton (+) ___ an electron (-) - Answer -Attracts The difference between atoms, with respect to chemical activity and stability, depends on the ___ and ___ of the electrons included within the atom. In general, the electrons reside in groups of orbits called shells. The shells are arranged in steps that correspond to fixed energy levels. - Answer -Number and position The outer shell of an atom is called the valence shell, and the electrons contained in this shell are called valence ___. - Answer -electrons The number of ___ electrons determines an atom's ability to gain or lose an electron, which in turn determines the chemical and electrical properties of the atom. - Answer -Valence An atom that is lacking only one or two electrons from its outer shell will ___ gain electrons to complete its shell, but a large amount of energy is required to free any of its electrons . - Answer -Easily An atom having a relatively small number of electrons in its outer shell in comparison to the number of electrons required to fill the shell will easily ___ these valence electrons. - Answer -Lose When it comes to electricity, the ___ electrons are of the most concern. - Answer -Valence All of the elements that make up matter may be placed into one of three categories: ___, ____, and ____. - Answer -Conductors, insulators and semiconductors Usually, a ___ has three or or fewer valence electrons - Answer -Conductor