FAA A&P Mechanics General Oral and Practical Questions with correct answers

What is the most important law applicable to the study of electricity? CORRECT ANSWER Ohm's Law (I = E ÷R) What are the elements of Ohm's Law? CORRECT ANSWER Voltage (E), current (I), and resistance (R) What are the sources of electrical power? CORRECT ANSWER Mechanical (generator), chemical (battery), photoelectric (light), and thermal (heat) What does an electrical circuit consist of? CORRECT ANSWER A source of electrical pressure or EMF, resistance in the form of an energy consuming electrical device or load, and conductors, usually in the form of copper or aluminum wires, to provide a path for electron flow. What represents capacitance in an AC circuit? CORRECT ANSWER A capacitor (condenser) What is the function of a capacitor? CORRECT ANSWER To store electricity What is inductance? CORRECT ANSWER A voltage that is induced in a coil in an AC circuit. This voltage is opposite in direction to the applied voltage, and opposes any change in the alternating current. What is impedance? CORRECT ANSWER It is the combined effect of resistance, inductive reactance, and capacitive reactance in an AC circuit