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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 a wire classification?
Stranded
First digit
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)

2. What makes electrons flow?
Circular and square mills(Both A and B)
Potential difference
Heat and current control(both a and c)
Silver

3. What is an electromagnet?
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)
A magnetic field
1 watt
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

4. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
Gauge number
Ohms
Wire splices

5. What do junction boxes protect?
Heat
Wire splices
Circular and square mills(Both A and B)
Energy

6. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
75 Ohms
First digit
Serial

7. What does a transformer transform?
Heat
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)
Gauge number
The relationship of potential difference to current

8. What information do the Left-Hand Rules provide?
The direction the negative charge moves
Area and spacing of capacitor - static current in the capacitor(both A and B)
Stores electrical charge
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

9. What is power?
Ability to store an electric charge
The rate of doing work
High resistance
The direction of the magnetic field

10. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Relationship between current and potential difference
Electromagnetic field
5%
75 Ohms

11. Which material has the lowest resistance at ordinary temperatures?
5%
Potential difference - E*I - current times current change from point to point(all of the above)
First digit is 9
Silver

12. When does a DC circuit oppose current flow?
Gauge number
Parallel
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Magnetic properties

13. What is a common measure of wire diameter?
Circular and square mills(Both A and B)
Cells can be connected together to make a battery
Gauge number
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

14. What is a rigid metal conduit?
Plastic - Rubber - Friction(all of the above)
--^V^V^V^---
5%
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

15. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
10
Heat
Purging
50 Ohms

16. What is another name for an inductor?
By their covering
Parallel
Choke
Ohms

17. What is a way to classify wires and cables?
Alternating current
By their covering
Opposition to movement of free electrons
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

18. Identify the blueprint symbol for resistors.
--^V^V^V^---
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Symbol
Common - not rechargable - gradually discharges when in storage(All of the above)

19. What determines whether a spark can be produced?
Bare - covered - insulated - stranded - cable(All of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Strength of the charge
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

20. What is the measure of potential difference?
Volts
Symbol
Fixed - Electrolytic - Variable(all of the above)
20%

21. What is an arrangement of materials that create a potential difference by chemistry?
Cell
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
75 Ohms
Grounding wire

22. What is a common form used in conductors?
Cables
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)
First digit
Use an effect to produce another effect

23. The generator is what method of creating potential energy?
Electromagnetism
Breakdown voltage
From the negative battery terminal to the positive terminal
Stores electrical charge

24. What is the unit of measurement of electrical current?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Moving vehicles
Amperes
The direction the negative charge moves

25. What is dielectric strength?
Magnetic properties
Bare - covered - insulated - stranded - cable(All of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
How much potential difference can a material withstand before breaking down

26. What is the relationship between magnetism and electricity?
Electromagnetism
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
A difference in potential energy
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)

27. How do static charges distribute themselves?
Secondary cell
Tolerence
Volts
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

28. What is needed for electric heating elements and the filaments of light bulbs?
A difference in potential energy
Ohms
A magnetic field
High resistance

29. What is voltage?
The direction of the magnetic field
A difference in potential energy
Current change in a coil creates a magnetic change
How much potential difference can a material withstand before breaking down

30. What are the two generic methods to eliminate static electricity from metal objects?
A magnetic field
Energy
Bonding and grounding
DC current

31. What does a third band of brown mean?
10
Symbol
Start with the band on the end and read to the center
Gauge number

32. 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
Voltmeter
Series circuit
12 volts
Produce heat - light - or limit current to control it(all of the above)

33. To what measurement do the conductor mills refer?
1/1000th of an inch
Grounding wire
1 watt
Current change in a coil creates a magnetic change

34. What does static electricity do?
Symbol
Ability to store an electric charge
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Does not move

35. Identify the general blueprint symbol for inductors.
Symbol
Solenoid and Relay(both A and B)
Tolerence
Composition of the resistor

36. What cannot be transformed to higher or lower potential differences?
DC current
Produce heat - light - or limit current to control it(all of the above)
Parallel
Porcelain

37. What is insulation resistance?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Produce heat - light - or limit current to control it(all of the above)
Electrical resistance against the flow of current
Electromagnetism

38. What is induction?
Current change in a coil creates a magnetic change
Use an effect to produce another effect
Resistance increases as the conductor length increases
Potential difference

39. What is a type of mechanical transducer?
75 Ohms
Ohms
Breakdown voltage
Solenoid and Relay(both A and B)

40. What is the use of the electromagnet?
15 -000 ohms - 20%
Cell
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Voltmeter

41. What must be large enough to carry the largest current likely to occur?
Parallel
Insulation resistance and Dielectric strength(Both A and B)
Stores electrical charge
Grounding wire

42. What is the basic law of magnetic force?
First digit is 9
From the negative battery terminal to the positive terminal
Unlike poles attract
Opposition to electrical current

43. What is the name for electrical resistance of insulation?
Insulation resistance
Battery
75 Ohms
Strength of the charge

44. What are the names of two of the six primary methods of producing a voltage?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Heat and current control(both a and c)
Wire splices
Heat

45. How is the heat production measured in a resistor?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)
Solenoid and Relay(both A and B)

46. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Symbol
Parallel
Resistance value can not be changed
Series circuit

47. How is capacitance determined?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Serial
A magnetic field
12 volts

48. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
Mutual induction
Energy
10

49. What is the unit of measurement of resistance?
Strength of the charge
Ohms
Cell
Relay

50. What is the type of cable composed of many fine wires?
Stranded
Symbol
High resistance
Ohms