AC THEORY/TRANSFORMERS UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

AC THEORY/TRANSFORMERS UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS

Question:
1. In a series circuit what is your reference
Answer:
Current

Question:
2. In a parallel circuit what is your reference
Answer:
Voltage

Question:
3. What are the sources of electrical energy?
Answer:
Magnetism, chemical energy, light, heat, pressure and friction

Question:
4. Electrical energy can produce what electrical effects?
Answer:
Chemical, light, heat, pressure, magnetism.

Question:
5. What are 3 ways to get energy from light?
Answer:
Photoemission, photovoltaic, photoconduction

Question:
6. What are the 3 ways light is made from electricity with low heat?
Answer:
Electroluminescent, fluorescents, phosphorescence.

Question:
7. What are the sources of light from electricity that causes heat?
Answer:
Incandescence, PN junction luminescence LEDs

Question:
8. In Electron current flow what direction do the electrons flow?
Answer:
- to +

Question:
9. Closed circuit

,Answer:
Normal current flow

Question:
10. Open circuit
Answer:
No current flow

Question:
11. In Conventional electron flow which way does the electrons flow?
Answer:
+ to -

Question:
12. Short circuit
Answer:
Maximum current flow back to the source by the lowest resistive path

Question:
13. Electrons in the Valence shell of conductor
Answer:
1 to 3 e-

Question:
14. Electrons in a Valence shell of a semiconductor
Answer:
4 e-

Question:
15. Electrons in a Valence shell of a insulator
Answer:
7 to 8 e-

Question:
16. What is the name for Highly magnetic materials?
Answer:
Ferromagnetic

Question:
17. What is the name for Weakly magnetic materials?
Answer:
Paramagnetic

Question:
18. What is the name of substances that block magnetic flux?

, Answer:
Diamagnetic

Question:
19. What are the three Ferromagnetic materials?
Answer:
Iron, nickel,cobalt

Question:
20. What are the five Paramagnetic materials?
Answer:
Aluminum,copper, chromium,platinum,titanium

Question:
21. What is the one Diamagnetic material?
Answer:
Brass

Question:
22. Conductor left hand rule
Answer:
Thumb= e- flow Fingers= direction of the magnetic field

Question:
23. Coil left hand rule
Answer:
Thumb= magnetic north Fingers= direction of the magnetic flux

Question:
24. Left hand rule Generator
Answer:
Thumb= Thrust direction of armature turn First finger= direction of magnetic flux field N to S Center
finger= Current flow direction

Question:
25. Intensity of the inductive field
Answer:
Number of turns in the coil Amount of current through the coil

Question:
26. Strength of a magnetic field depends on
Answer:
How close the coils are together The permeability of the core

Question:
27. Ac generator components