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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 are the two generic methods to eliminate static electricity from metal objects?
Opposes any change in the current flowing in a circuit
Plastic - Rubber - Friction(all of the above)
Bonding and grounding
Ability to store an electric charge

2. What is the basic law of magnetic force?
15 -000 ohms - 20%
Unlike poles attract
Electrical resistance against the flow of current
Secondary cell

3. What is insulation resistance?
Electrical resistance against the flow of current
The direction of the magnetic field
Electromagnetic field
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

4. What is the purpose of a raceway?
Series circuit
Moving vehicles
Current change in a coil creates a magnetic change
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

5. What results when current is run through a material with high resistance?
A difference in potential energy
Heat and current control(both a and c)
Potential difference
Grounding wire

6. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
5%
Purging
Insulation resistance and Dielectric strength(Both A and B)

7. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Purging
10
5%
Ohms

8. What does resistance produce?
Heat
Silver
10%
Grounding wire

9. How do static charges distribute themselves?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Cell

10. How is the heat production measured in a resistor?
Potential difference - E*I - current times current change from point to point(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Produce heat - light - or limit current to control it(all of the above)

11. What do we call the ability to do work?
Electromagnetic field
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Energy
Moving vehicles

12. What is a common form used in conductors?
Cables
Mutual induction
Stranded
Volts

13. What is the relationship of conductor size and length to resistance?
Volts
Resistance increases as the conductor length increases
1/1000th of an inch
First digit is 9

14. Why is the transformer important to AC electricity?

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15. How many kinds of poles do magnets have?
Opposes any change in the current flowing in a circuit
1 watt
Two
By their covering

16. What is the type of cable composed of many fine wires?
Stranded
1/1000th of an inch
Choke
Cells can be connected together to make a battery

17. Where does the thumb point in both Left-Hand Rules?
5%
A difference in potential energy
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
The direction the negative charge moves

18. What is a type of capacitor?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Fixed - Electrolytic - Variable(all of the above)
--^V^V^V^---
Series circuit

19. What is the unit of measurement of electrical current?
Grounding wire
Volts
Amperes
Ability to store an electric charge

20. What determines the resistance of a resistor?
Strength of the charge
Magnetic properties
Composition of the resistor
Opposes any change in the current flowing in a circuit

21. What information do the Left-Hand Rules provide?
Stores electrical charge
Chemical action
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)

22. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Current change in a coil creates a magnetic change
1 watt
Bonding and grounding

23. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Strength of the charge
By their covering
50 Ohms

24. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Current change in a coil creates a magnetic change
Electromagnetic field
Serial
--^V^V^V^---

25. Which type of cell can be recharged?
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)
Secondary cell
Parallel
Relay

26. What does a first band of white mean?
Stores electrical charge
--^V^V^V^---
First digit is 9
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

27. What is the fundamental property of insulators?
Opposition to movement of free electrons
Parallel
Silver
Insulation resistance and Dielectric strength(Both A and B)

28. What is capacitance in electrical terms?
Ability to store an electric charge
Volts
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Serial

29. What is voltage?
Bare - covered - insulated - stranded - cable(All of the above)
A difference in potential energy
Cells can be connected together to make a battery
10

30. What is the measure of potential difference?
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
American wire gauge(AWG)
Volts

31. 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
Composition of the resistor
12 volts
Current flows in one direction - potential differences across a load does not change(Both A and B)
Produce heat - light - or limit current to control it(all of the above)

32. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Opposition to electrical current
Cells can be connected together to make a battery
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Alternating current

33. What do electrical charges need to cause a fire or explosion?
Symbol
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)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Does not move

34. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
10%
First digit is 9
A magnetic field

35. When reading resistance color codes - what does the fourth band indicate?
Plastic - Rubber - Friction(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Tolerence
How much potential difference can a material withstand before breaking down

36. Which of the following is a type of resistor?
Potential difference
Use an effect to produce another effect
Fixed - tapped - variable(all of the above)
A magnetic field

37. What do junction boxes protect?
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)
Insulation resistance
Resistance value can not be changed
Wire splices

38. What is a characteristic of a fixed resistor?
Does not move
Symbol
Voltage
Resistance value can not be changed

39. What is the difference between AC and DC?
Stores electrical charge
12 volts
Tolerence
DC flows continuously in one direction and AC potential difference and current both change direction

40. How is capacitance determined?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Solenoid and Relay(both A and B)
Produce heat - light - or limit current to control it(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)

41. What must be large enough to carry the largest current likely to occur?
Produce heat - light - or limit current to control it(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)
Grounding wire
Fixed - Electrolytic - Variable(all of the above)

42. What makes electrons flow?
Wire splices
How much potential difference can a material withstand before breaking down
Potential difference
20%

43. What do transducers do in electrical terms?
Electromagnetism
Relationship between current and potential difference
Use an effect to produce another effect
Parallel circuit

44. The dry cell is what method for creating potential energy?
Secondary cell
Ability to store an electric charge
Bonding and grounding
Chemical action

45. What is a wire classification?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Bare - covered - insulated - stranded - cable(All of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
Strength of the charge

46. What is the use of the electromagnet?
Volts
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Magnetic properties
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

47. What does a transformer transform?
Bonding and grounding
The relationship of potential difference to current
Strength of the charge
Heat and current control(both a and c)

48. In most applications - what remains constant if the current remains constant and flows in one direction?
Stranded
Energy
Resistance value can not be changed
Electromagnetic field

49. Where do the fingers point in both Left-Hand Rules?
--^V^V^V^---
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Produce heat - light - or limit current to control it(all of the above)
The direction of the magnetic field

50. What type of circuit has one path of follow through a load?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Heat
Start with the band on the end and read to the center
Series circuit

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Basic Electricity

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