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Basic Electricity

Instructions:

Answer 50 questions in 15 minutes.
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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 for two or more cells attached together?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Battery
Does not move
Grounding wire

2. What is the purpose of a raceway?
Circular and square mills(Both A and B)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
The rate of doing work
Symbol

3. What determines the resistance of a resistor?
Composition of the resistor
Does not move
The direction of the magnetic field
Gauge number

4. Identify the blueprint symbol for capacitors.
Alternating current
Ability to store an electric charge
Potential difference - E*I - current times current change from point to point(all of the above)
Symbol

5. What is resistance in electrical terms?
Choke
Circular and square mills(Both A and B)
DC current
Opposition to electrical current

6. What is resistance?
A magnetic field
Opposition to movement of free electrons
First digit
Insulation resistance and Dielectric strength(Both A and B)

7. When reading resistance color codes - what does the fourth band indicate?
How much potential difference can a material withstand before breaking down
Tolerence
By their covering
Stores electrical charge

8. What results when current is run through a material with high resistance?
American wire gauge(AWG)
Unlike poles attract
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Heat and current control(both a and c)

9. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
Tolerence
Heat
Alternating current

10. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Fixed - tapped - variable(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Gauge number

11. What is the use of the electromagnet?
The direction of the magnetic field
Parallel circuit
Magnetic properties
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

12. What are the common units of measurement for round and square conductor cross - sections?
Purging
Voltage
Circular and square mills(Both A and B)
1 watt

13. What is the measure of potential difference?
Volts
It increases or decreases the potential difference of AC electricity - It is effective with almost no loss of power - It's use- cost is very low(All of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Opposition to electrical current

14. Where does the thumb point in both Left-Hand Rules?
Alternating current
Ability to store an electric charge
The direction the negative charge moves
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

15. When does a DC circuit oppose current flow?
Ability to store an electric charge
10%
Potential difference
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

16. What must be large enough to carry the largest current likely to occur?
The rate of doing work
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Grounding wire
Porcelain

17. What makes electrons flow?
Potential difference
Ability to store an electric charge
Electrical resistance against the flow of current
50 Ohms

18. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
It increases or decreases the potential difference of AC electricity - It is effective with almost no loss of power - It's use- cost is very low(All of the above)
From the negative battery terminal to the positive terminal
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
50 Ohms

19. How do static charges distribute themselves?
Opposition to movement of free electrons
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Area and spacing of capacitor - static current in the capacitor(both A and B)
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)

20. 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)
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)
Volts

21. What is the type of cable composed of many fine wires?
Stranded
Current change in a coil creates a magnetic change
Two
Relationship between current and potential difference

22. What type of circuit has one path of follow through a load?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Common - not rechargable - gradually discharges when in storage(All of the above)
Series circuit
DC current

23. How is capacitance determined?
Grounding wire
Two
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)
Area and spacing of capacitor - static current in the capacitor(both A and B)

24. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
The relationship of potential difference to current
1/1000th of an inch
Bare - covered - insulated - stranded - cable(All of the above)

25. What wire measurement is commonly used in the U.S.?
20%
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
American wire gauge(AWG)

26. What is the fundamental property of insulators?
Plastic - Rubber - Friction(all of the above)
Volts
Battery
Insulation resistance and Dielectric strength(Both A and B)

27. Where do the fingers point in both Left-Hand Rules?
75 Ohms
Moving vehicles
The direction of the magnetic field
How much potential difference can a material withstand before breaking down

28. What does Ohm's Law represent?
American wire gauge(AWG)
Electromagnetic field
Relationship between current and potential difference
Electromagnetism

29. What is a property of inductors in electrical circuits?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Energy
American wire gauge(AWG)
Opposes any change in the current flowing in a circuit

30. To what measurement do the conductor mills refer?
--^V^V^V^---
1/1000th of an inch
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Bonding and grounding

31. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Series circuit
Volts
Does not move

32. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Purging
10%
Voltage
Opposition to electrical current

33. What do junction boxes protect?
Wire splices
Chemical action
Silver
Insulation resistance

34. The generator is what method of creating potential energy?
Relationship between current and potential difference
Stranded
Electromagnetism
DC current

35. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
How much potential difference can a material withstand before breaking down
Opposes any change in the current flowing in a circuit
10%
Mutual induction

36. What is power?
Does not move
Heat
The rate of doing work
Resistance increases as the conductor length increases

37. How do you read resistor color codes?
Use an effect to produce another effect
Start with the band on the end and read to the center
Voltmeter
Circular and square mills(Both A and B)

38. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Ability to store an electric charge
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Alternating current
DC current

39. What is the term for doing work at the rate of joule per second?
Heat and current control(both a and c)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
1/1000th of an inch
1 watt

40. What is a type of capacitor?
Choke
Fixed - Electrolytic - Variable(all of the above)
Resistance increases as the conductor length increases
10

41. The dry cell is what method for creating potential energy?
Chemical action
Relationship between current and potential difference
Strength of the charge
Ability to store an electric charge

42. What is the difference between AC and DC?
Electromagnetism
Electrical resistance against the flow of current
DC flows continuously in one direction and AC potential difference and current both change direction
Purging

43. What does an object have if a magnetic field acts on it?
Magnetic properties
Chemical action
Symbol
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

44. What is the basic law of magnetic force?
Produce heat - light - or limit current to control it(all of the above)
Electromagnetic field
First digit
Unlike poles attract

45. What is the name for electrical resistance of insulation?
Insulation resistance
Use an effect to produce another effect
Area and spacing of capacitor - static current in the capacitor(both A and B)
Opposition to electrical current

46. Which of the following materials is NOT a good conductor?
DC flows continuously in one direction and AC potential difference and current both change direction
DC current
Porcelain
1/1000th of an inch

47. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Opposition to electrical current
5%
Parallel
Grounding wire

48. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Bonding and grounding
10%
Voltage
Heat

49. What is a conductor?
Silver
Parallel
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Tolerence

50. What is the unit of measurement of electrical current?
Produce heat - light - or limit current to control it(all of the above)
Circular and square mills(Both A and B)
Amperes
Voltmeter

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Basic Electricity

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