Test your basic knowledge |

Basic Electricity

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?
12 volts
Heat and current control(both a and c)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

2. Which of the following materials is NOT a good conductor?
By their covering
Amperes
Porcelain
Choke

3. What is resistance?
Volts
Opposition to movement of free electrons
Parallel
Heat

4. What is capacitance in electrical terms?
Ability to store an electric charge
20%
Opposes any change in the current flowing in a circuit
Stranded

5. What is the name for electrical resistance of insulation?
Breakdown voltage
Potential difference
Insulation resistance
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

6. Where does the thumb point in both Left-Hand Rules?
Choke
The direction the negative charge moves
Produce heat - light - or limit current to control it(all of the above)
10

7. What are the common units of measurement for round and square conductor cross - sections?
A magnetic field
Energy
Circular and square mills(Both A and B)
Stranded

8. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
DC flows continuously in one direction and AC potential difference and current both change direction
Electromagnetic field
Moving vehicles
20%

9. The thermocouple uses which method for creating potential energy?
Relationship between current and potential difference
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Start with the band on the end and read to the center
Heat

10. What is the unit of measurement of electrical current?
A difference in potential energy
Heat
Amperes
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

11. How is capacitance determined?
20%
Volts
Current change in a coil creates a magnetic change
Area and spacing of capacitor - static current in the capacitor(both A and B)

12. What do electrical charges need to cause a fire or explosion?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Opposition to electrical current
Strength of the charge
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

13. What is the term for two or more cells attached together?
Potential difference
Battery
Solenoid and Relay(both A and B)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

14. What does static electricity do?
Fixed - tapped - variable(all of the above)
Does not move
Grounding wire
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

15. What is induction?
Opposes any change in the current flowing in a circuit
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Stores electrical charge
Current change in a coil creates a magnetic change

16. What is the basic law of magnetic force?
Secondary cell
Unlike poles attract
The direction the negative charge moves
10

17. What determines the resistance of a resistor?
Magnetic properties
Composition of the resistor
Choke
A difference in potential energy

18. What is the term for doing work at the rate of joule per second?
1 watt
Parallel circuit
Volts
Bare - covered - insulated - stranded - cable(All of the above)

19. What is the unit of measurement of potential difference?
Serial
Relationship between current and potential difference
Energy
Volts

20. What does an object have if a magnetic field acts on it?
Parallel
Common - not rechargable - gradually discharges when in storage(All of the above)
Magnetic properties
75 Ohms

21. In most applications - what remains constant if the current remains constant and flows in one direction?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Electromagnetic field
Resistance increases as the conductor length increases
DC flows continuously in one direction and AC potential difference and current both change direction

22. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Fixed - Electrolytic - Variable(all of the above)
10%
15 -000 ohms - 20%
Volts

23. What is a common cause of static electricity in a shop?
Moving vehicles
Start with the band on the end and read to the center
5%
Ability to store an electric charge

24. When reading resistance color codes - what does the first band indicate?
Strength of the charge
First digit
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Plastic - Rubber - Friction(all of the above)

25. Identify the blueprint symbol for capacitors.
Symbol
A magnetic field
From the negative battery terminal to the positive terminal
Mutual induction

26. What does a moving charge produce?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Circular and square mills(Both A and B)
A magnetic field
Mutual induction

27. What do we call the ability to do work?
Relationship between current and potential difference
Breakdown voltage
Energy
Ohms

28. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Electromagnetic field
50 Ohms
First digit is 9
1/1000th of an inch

29. When does a DC circuit oppose current flow?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Voltmeter
50 Ohms

30. What cannot be transformed to higher or lower potential differences?
DC current
75 Ohms
Opposition to movement of free electrons
Amperes

31. What is a conductor?
Start with the band on the end and read to the center
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Solenoid and Relay(both A and B)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

32. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
Insulation resistance and Dielectric strength(Both A and B)
Chemical action
Circular and square mills(Both A and B)

33. What is the relationship between magnetism and electricity?
Magnetism produces a field and the field exerts force on a moving charge - every moving electrical charge produces a magnetic field - and the magnetic field is strong when the electrical charge is strong and moves rapidly(all of the above are true)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Strength of the charge
Fixed - tapped - variable(all of the above)

34. What is the purpose of capacitors in electrical circuits?
Volts
5%
Magnetic properties
Stores electrical charge

35. What is a type of capacitor?
Stores electrical charge
Voltage
Electromagnetism
Fixed - Electrolytic - Variable(all of the above)

36. How many kinds of poles do magnets have?
Stranded
From the negative battery terminal to the positive terminal
50 Ohms
Two

37. What makes electrons flow?
Cables
First digit is 9
Opposes any change in the current flowing in a circuit
Potential difference

38. A resistor is color coded brown - green - orange. What is its resistance?
10
15 -000 ohms - 20%
Potential difference
Alternating current

39. What does resistance produce?
Electromagnetism
The direction of the magnetic field
Ability to store an electric charge
Heat

40. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Choke
Series circuit
First digit

41. How do you read resistor color codes?
20%
--^V^V^V^---
The relationship of potential difference to current
Start with the band on the end and read to the center

42. What is the difference between AC and DC?
The relationship of potential difference to current
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Produce heat - light - or limit current to control it(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction

43. What is a wire classification?
Start with the band on the end and read to the center
DC current
Potential difference
Bare - covered - insulated - stranded - cable(All of the above)

44. Why is the transformer important to AC electricity?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

45. The dry cell is what method for creating potential energy?
Relationship between current and potential difference
Ohms
Chemical action
Circular and square mills(Both A and B)

46. What does a first band of white mean?
High resistance
A difference in potential energy
The direction the negative charge moves
First digit is 9

47. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
12 volts
Potential difference
Magnetic properties

48. What is another name for an inductor?
Secondary cell
American wire gauge(AWG)
Choke
A difference in potential energy

49. What is needed for electric heating elements and the filaments of light bulbs?
Secondary cell
Heat
Electrical resistance against the flow of current
High resistance

50. What is a type of mechanical transducer?
Porcelain
Two
Start with the band on the end and read to the center
Solenoid and Relay(both A and B)