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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 is induction?
First digit
Secondary cell
Current change in a coil creates a magnetic change
Serial

2. What is the type of cable composed of many fine wires?
Series circuit
Electromagnetic field
12 volts
Stranded

3. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Alternating current
Amperes
Choke
Resistance increases as the conductor length increases

4. What is a characteristic of insulators?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Produce heat - light - or limit current to control it(all of the above)
Parallel circuit

5. What is power?
Volts
Potential difference - E*I - current times current change from point to point(all of the above)
Mutual induction
The rate of doing work

6. What is the relationship of conductor size and length to resistance?
75 Ohms
Grounding wire
Resistance increases as the conductor length increases
Opposition to electrical current

7. Why is the transformer important to AC electricity?

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8. What instrument measures voltage?
Grounding wire
Fixed - tapped - variable(all of the above)
Voltmeter
Parallel circuit

9. What do junction boxes protect?
1 watt
Relay
Wire splices
High resistance

10. Which type of cell can be recharged?
Opposition to electrical current
Secondary cell
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)

11. How do static charges distribute themselves?
The relationship of potential difference to current
The direction the negative charge moves
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Resistance increases as the conductor length increases

12. What is a DC circuit characteristic?
Symbol
Current flows in one direction - potential differences across a load does not change(Both A and B)
Heat
Use an effect to produce another effect

13. What does Ohm's Law represent?
20%
The direction of the magnetic field
Relationship between current and potential difference
Start with the band on the end and read to the center

14. How is the heat production measured in a resistor?
Cells can be connected together to make a battery
Relay
Potential difference - E*I - current times current change from point to point(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

15. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
1 watt
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
--^V^V^V^---
Parallel

16. What is an arrangement of materials that create a potential difference by chemistry?
Voltmeter
Heat
DC current
Cell

17. What is the fundamental property of insulators?
Heat
Opposition to electrical current
Series circuit
Insulation resistance and Dielectric strength(Both A and B)

18. What is a type of capacitor?
Symbol
Fixed - Electrolytic - Variable(all of the above)
Energy
DC current

19. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Parallel
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Purging
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

20. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Ability to store an electric charge
1/1000th of an inch
Potential difference - E*I - current times current change from point to point(all of the above)

21. What are the two generic methods to eliminate static electricity from metal objects?
5%
Bonding and grounding
Potential difference
Cell

22. What is a way to classify wires and cables?
By their covering
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Electrical resistance against the flow of current
Start with the band on the end and read to the center

23. A resistor is color coded brown - green - orange. What is its resistance?
Opposition to electrical current
Moving vehicles
15 -000 ohms - 20%
Gauge number

24. What is resistance?
Opposition to electrical current
Volts
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Opposition to movement of free electrons

25. What determines whether a spark can be produced?
Strength of the charge
Wire splices
Amperes
Gauge number

26. Where do the fingers point in both Left-Hand Rules?
Does not move
Battery
The direction of the magnetic field
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

27. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
Opposition to electrical current
--^V^V^V^---
Bonding and grounding

28. How is capacitance determined?
Area and spacing of capacitor - static current in the capacitor(both A and B)
--^V^V^V^---
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Energy

29. Identify the blueprint symbol for capacitors.
Opposition to movement of free electrons
Symbol
12 volts
Opposes any change in the current flowing in a circuit

30. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
Heat
Chemical action
Potential difference

31. What is an electromagnet?
Choke
Silver
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

32. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
American wire gauge(AWG)
Heat and current control(both a and c)
Series circuit

33. What is the relationship between cells and batteries?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Cells can be connected together to make a battery
Volts
Common - not rechargable - gradually discharges when in storage(All of the above)

34. What is the term for two or more cells attached together?
Fixed - tapped - variable(all of the above)
Symbol
Battery
12 volts

35. Which material has the lowest resistance at ordinary temperatures?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Silver
Relationship between current and potential difference

36. What does a moving charge produce?
A magnetic field
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Heat and current control(both a and c)
Fixed - Electrolytic - Variable(all of the above)

37. Identify the general blueprint symbol for inductors.
Symbol
First digit
Breakdown voltage
Voltmeter

38. What is the use of the electromagnet?
Bare - covered - insulated - stranded - cable(All of the above)
Parallel
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A magnetic field

39. Which of the following materials is NOT a good conductor?
By their covering
Produce heat - light - or limit current to control it(all of the above)
Porcelain
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

40. What is a switch that operates by electricity?
A magnetic field
Relay
20%
Alternating current

41. 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)
The relationship of potential difference to current
Stores electrical charge
Mutual induction

42. What does resistance produce?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Heat
Potential difference
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

43. The generator is what method of creating potential energy?
Battery
Electromagnetism
Stores electrical charge
Plastic - Rubber - Friction(all of the above)

44. When reading resistance color codes - what does the fourth band indicate?
Start with the band on the end and read to the center
Tolerence
10
The rate of doing work

45. Identify the blueprint symbol for resistors.
Serial
Symbol
--^V^V^V^---
Purging

46. What is the unit of measurement of electrical current?
Serial
Relationship between current and potential difference
1 watt
Amperes

47. What cannot be transformed to higher or lower potential differences?
Breakdown voltage
Strength of the charge
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
DC current

48. 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
75 Ohms
Battery
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Mutual induction

49. What makes electrons flow?
Potential difference
Circular and square mills(Both A and B)
DC current
Amperes

50. What type of circuit has one path of follow through a load?
10
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Series circuit
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)