NCCER Electrical Module 26103-20 FINAL EXAM STUDY GUIDE 2025/2026 COMPLETE QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS RECENT VERSION

NCCER Electrical Module 26103-20 FINAL EXAM STUDY GUIDE 2025/2026 COMPLETE QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS RECENT VERSION 1. 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) 2. 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 3. The term ___ can be taken to mean a quantity of electricity that is either positive or negative. - ANSWER Charge 4. 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 5. The ability of a charge to do work is called its ____. - ANSWER Potential 6. When one charge is different from another, there is a difference in potential between them. The ____ of the difference of potential of all the charges in the electrostatic field is referred to as the potential difference, electromotive force (EMF) , or voltage. - ANSWER Sum 7. ____ is directly related to the ability of a material to conduct electricity. - ANSWER Resistance 8. All conductors have very ___ resistance; insulators have very ____ resistance. - ANSWER Low, High 9. Resistance can be defined as the opposition to current flow. To add resistance to a circuit, electrical components called ____ are used. - ANSWER Resistors 10. A resistor is a device whose resistance to current flow is known, specified value. Resistance is measured in ____ and is represented by the symbol R is equations. - ANSWER Ohms 11. The resistance of a wire is proportional to the ___ of the wire, inversely proportional to the ___ area of the wire and dependent upon the kind of material which the wire is made. - ANSWER Length, /cross-sectional 12. A mil equals ____ inch; a circular mil is the cross-sectional area of a wire one mil in diameter. - ANSWER 0.001 13. Current- the current in a circuit is equal to the voltage applied to the circuit divided by the resistance of the circuit: - ANSWER I=E/R 14. Resistance- the resistance of a circuit is equal to the voltage applied to the circuit divided by he current in a circuit: - ANSWER R=E/I 15. Voltage- the applied voltage of a circuit is equal to the product if the current and the resistance of the circuit: - ANSWER E= I X R 16. Coulomb's law can be used to calculate the ____. - ANSWER Force between two charges 17. The negative terminal of a battery contains a large reserve of free ____. - ANSWER Electrons 18. Which of the following does not have an affect on wire resistance? A) temperature B) type of power C) wire length D) material - ANSWER B) Type of power 19. Find the applied voltage when the current is 30A and the resistance is 4 Ohms. - ANSWER 120 V 20. The function of a resistor is to offer a particular resistance to current flow. For a given current and known resistance, the change in voltage across the component, or ____ , can be predicted using Ohm's law. - ANSWER Voltage drop 21. The two most common electronic resistors are ____ and ____ composition construction. - ANSWER Wire-wound, carbon 22. Electronic circuits sometimes contain a hybrid arrangement known as a ______ circuit. However, you will rarely find loads connected in this arrangement. - ANSWER Series-parallel 23. Electricians frequently use test meters to measure voltage, current, and resistance. The most common type of meter is the volt-ohm-milliameter (VOM) also called a _____. - ANSWER Multimeter 24. Multimeters are commonly used to measure AC and DC voltage, DC current, and resistance. They can also be used to measure AC current in the milliamp range. For larger current values, it is usually necessary to use a _____ ammeter. - ANSWER Clamp-on 25. A ____ must be connected in parallel with (across) the component to be tested. If a circuit function is not operating you will be able to determine if the correct voltage is available to the circuit. Voltage must be check with power applied. - ANSWER voltmeter 26. An ____ contains an internal battery that acts as a voltage source. Therefore, resistance measurements are always made with the system power shut off. Sometimes, its used to measure resistance in a load; motor windings are a good example. More often than not it is used to check continuity in a circuit. - ANSWER Ohmmeter