AMT: General Oral & Practical Exam 2023 with 100% correct answers

What constitutes a capacitor? - correct answer Two conductors separated by an insulator. What is the purpose of a capacitor? - correct answer It stores electrical energy in electrostatic fields. Does a capacitor in an AC circuit cause the current to lead or lag the voltage? - correct answer It causes the current to lead the voltage. What is the basic unit of capacitance? - correct answer The ferad. Why should electrolytic capacitors not be used in an AC circuit? - correct answer They are polarized. An electrolytic capacitor will pass current of one polarity, but will block current of the opposite polarity. What is meant by inductance? - correct answer The ability to store electrical energy in electromagnetic fields. What is the basic unit of inductance? - correct answer The henry. What is an example of an inductor used in a magneto? - correct answer The coil. Does an inductor in an AC circuit cause the current to lead or lag the voltage? - correct answer It causes the current to lag behind the voltage. How can you find the polarity of an electromagnet? - correct answer Hold the electromagnet in your left hand with your fingers encircling the coil in the direction electrons flow (from negative to positive). Your thumb will point to the north pole of the electromagnet. What is meant by impedance? - correct answer The total opposition to the flow of alternating current. It is the vector sum of resistance capacitive reactance, and inductive reactance. In what units is impedance measured? - correct answer In ohms. What are five sources of electrical energy? - correct answer Magnetism, chemical energy, light, heat, and pressure. What is the basic unit of power in a DC circuit? - correct answer The watt. What is me