NCTI Installer Technician 100% SOLUTION 2023//2024

NCTI Installer Technician 100% SOLUTION 2023//2024 20 milliamperes is the same as ________. (Remember, 1 milliampere = 0.001 ampere.) - ANSWER 0.02 amperes The orbital shell that has a maximum electron capacity of 18 electrons is the ___________ shell. - ANSWER Third A semiconductor material - ANSWER Has four valence electrons. The major factor for determining whether a particular element is a conductor, a semiconductor, or an insulator is - ANSWER The number of electrons in the valence shell. Elements that are called conductors - ANSWER Have very few valence electrons. The term voltage normally refers to - ANSWER The measurement of the difference in potential between two charges. The ampere - ANSWER Indicates how many coulombs pass a given point during 1 second. Electric current is actually produced by - ANSWER The transfer of energy from valence electron to valence electron as a result of applied charges. What prevents the electrons that orbit an atom's nucleus at high speeds from breaking away from the nucleus due to centrifugal force? - ANSWER The attraction between the positive nucleus and the negative electron. 5 kilovolts is the same as - ANSWER 5 kV. To create an electromagnet, - ANSWER Wrap a coil of insulated wire around an iron bar and pass an electric current through the wire. Magnetism - ANSWER Was discovered when the Greeks noticed that magnetite always aligned itself in a north and south direction. In a magnetic material, - ANSWER Where only some of the magnetic domains are pointing in the same direction, the magnetic field is weaker. The strength of an electromagnetic field is - ANSWER Determined by the magnitude of the magnetomotive force (mmf). The magnetic field - ANSWER Created by a straight piece of wire is weaker than that created by forming loops of wire. Flux lines - ANSWER Always curve around through the body of the magnet to form complete loops. Magnetic poles that are ___________ will ____________ each other when those poles are near each other. - ANSWER Alike, repel A permanent-magnet loudspeaker - ANSWER Has a cone that moves back and forth in relation to the varying current of the original sound. The left-hand rule for electromagnetism in a wire states that - ANSWER If you wrap the fingers of your left hand around the wire with your thumb pointing in the direction of the current flow, your fingers will be wrapped in the direction of the magnetic field. The recording head of a tape recorder is actually a(an) - ANSWER Electromagnet. (-25) + (42) + (-62) + (20) = - ANSWER -25 (-17) - (-34) = - ANSWER 17 (17) x (-19) = - ANSWER -323 -49/-7 = - ANSWER 7 (20) / (-4) + (-2) x (-10) - (-2) x (7) = - ANSWER 29 3 6/9 + 6 1/3 + 9 5/9 = - ANSWER 19 5/9 4/7 x 9 4/11 = - ANSWER 5 27/77 7 3/8 divided by 7 1/4 = - ANSWER 1 1/58 13 X 0.123 = - ANSWER 0.99999 0.5349 divided by 0.1420 = - ANSWER 3.7669014 Which of the following is a true axiom? - ANSWER When A = C and B = C, then A = B because both are equal to C, which supports the axiom: Quantities equal to the same quantity are equal to each other. Simplify and solve the equation: If E = IR then what is the formula for finding I? - ANSWER E/R. The square of 7 = _____. - ANSWER 49 The square root of 81 = _____. - ANSWER 9 0.00004 = ______ x 10 to the power of ______. - ANSWER 4, -5 (75 x 10^3)+(25 x 10^4) = ____. - ANSWER 32.5 x 10^4 (480 x 10^-5) / (60 x 10^-3) = _____. - ANSWER 8 x 10^-2 10 to the power of -3 has a metric prefix of ______. - ANSWER Milli (250 x 10^-6) - (7 x 10^-5) = _____. - ANSWER 180 x 10^-6 (75 x 10^3) + (2.5 x 10^4) = ____. - ANSWER 100 x 10^3 What are the three basic elements of an electrical circuit? - ANSWER A power source, a load, and the connecting conductors. The power source - ANSWER Is the part of an electrical circuit that provides a difference of potential. The load - ANSWER Is the part of the electrical circuit that uses the electrical energ