Test your basic knowledge |

Basic Electricity

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?






2. What is a property of inductors in electrical circuits?






3. What does a transformer transform?






4. What is needed for electric heating elements and the filaments of light bulbs?






5. What do junction boxes protect?






6. What does a first band of white mean?






7. What does resistance produce?






8. What is the relationship between magnetism and electricity?






9. What can permanently break down a capacitor?






10. What type of circuit has two or more paths for current to follow?






11. What is the purpose of resistors in electrical circuits?






12. The generator is what method of creating potential energy?






13. What does an object have if a magnetic field acts on it?






14. What is the term for two or more cells attached together?






15. What does static electricity do?






16. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?






17. What does a third band of brown mean?






18. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?






19. What do electrical charges need to cause a fire or explosion?






20. What is a characteristic of insulators?






21. Given E=I X R and the following information - plug in the data and solve the problem for voltage. 0.015 ohms - 800 amps of current






22. What is an electromagnet?






23. What is the relationship between cells and batteries?






24. What do we call the ability to do work?






25. Identify the blueprint symbol for resistors.






26. To what measurement do the conductor mills refer?






27. What are the common units of measurement for round and square conductor cross - sections?






28. What makes electrons flow?






29. When does a DC circuit oppose current flow?






30. What is voltage?






31. What determines whether a spark can be produced?






32. What is the fundamental property of insulators?






33. What type of circuit has one path of follow through a load?






34. What is a DC circuit characteristic?






35. What is the basic law of magnetic force?






36. What does a moving charge produce?






37. When reading resistance color codes - what does the fourth band indicate?






38. What is induction?






39. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?






40. How is capacitance determined?






41. Which of the following is a type of resistor?






42. What is an arrangement of materials that create a potential difference by chemistry?






43. When reading resistance color codes - what does the first band indicate?






44. Which way is the current going in the circuit shown?(electron flow)






45. What is the relationship of conductor size and length to resistance?






46. What results when current is run through a material with high resistance?






47. Where does the thumb point in both Left-Hand Rules?






48. What is the name for electrical resistance of insulation?






49. Given R=E / I and the following information - plug in the data and solve the problem for resistance. 1.5 volt walkman battery - 0.02 amps of current






50. What is the measure of potential difference?