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






2. Which of the following materials is NOT a good conductor?






3. What is resistance?






4. What is capacitance in electrical terms?






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






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






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






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






9. The thermocouple uses which method for creating potential energy?






10. What is the unit of measurement of electrical current?






11. How is capacitance determined?






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






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






14. What does static electricity do?






15. What is induction?






16. What is the basic law of magnetic force?






17. What determines the resistance of a resistor?






18. What is the term for doing work at the rate of joule per second?






19. What is the unit of measurement of potential difference?






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






21. In most applications - what remains constant if the current remains constant and flows in one direction?






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






23. What is a common cause of static electricity in a shop?






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






25. Identify the blueprint symbol for capacitors.






26. What does a moving charge produce?






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






28. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.






29. When does a DC circuit oppose current flow?






30. What cannot be transformed to higher or lower potential differences?






31. What is a conductor?






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






33. What is the relationship between magnetism and electricity?






34. What is the purpose of capacitors in electrical circuits?






35. What is a type of capacitor?






36. How many kinds of poles do magnets have?






37. What makes electrons flow?






38. A resistor is color coded brown - green - orange. What is its resistance?






39. What does resistance produce?






40. What is the use of the electromagnet?






41. How do you read resistor color codes?






42. What is the difference between AC and DC?






43. What is a wire classification?






44. Why is the transformer important to AC electricity?

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45. The dry cell is what method for creating potential energy?






46. What does a first band of white mean?






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






48. What is another name for an inductor?






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






50. What is a type of mechanical transducer?