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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 wire measurement is commonly used in the U.S.?
Ohms
Resistance value can not be changed
Resistance increases as the conductor length increases
American wire gauge(AWG)

2. 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)
Potential difference
12 volts
Plastic - Rubber - Friction(all of the above)

3. What type of circuit has one path of follow through a load?
The direction the negative charge moves
Breakdown voltage
Plastic - Rubber - Friction(all of the above)
Series circuit

4. What determines whether a spark can be produced?
15 -000 ohms - 20%
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Strength of the charge
--^V^V^V^---

5. What is the type of cable composed of many fine wires?
Stranded
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
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)

6. What information do the Left-Hand Rules provide?
15 -000 ohms - 20%
Parallel
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
First digit

7. What is the basic law of magnetic force?
Parallel circuit
Unlike poles attract
Stranded
Breakdown voltage

8. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
5%
American wire gauge(AWG)
Heat
Purging

9. What is the difference between AC and DC?
Battery
DC flows continuously in one direction and AC potential difference and current both change direction
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Moving vehicles

10. What does static electricity do?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Volts
Does not move
High resistance

11. What are the common units of measurement for round and square conductor cross - sections?
Voltage
First digit
Ohms
Circular and square mills(Both A and B)

12. What is an arrangement of materials that create a potential difference by chemistry?
Start with the band on the end and read to the center
Silver
Cell
Opposition to electrical current

13. What makes electrons flow?
Potential difference
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)
The direction the negative charge moves

14. Identify the general blueprint symbol for inductors.
Chemical action
Symbol
Heat
Cells can be connected together to make a battery

15. Identify the blueprint symbol for resistors.
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Heat
--^V^V^V^---
Symbol

16. What type of circuit has two or more paths for current to follow?
Parallel circuit
5%
Energy
Alternating current

17. What instrument measures voltage?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
15 -000 ohms - 20%
Voltmeter
Serial

18. What do transducers do in electrical terms?
Use an effect to produce another effect
Parallel
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Purging

19. What does a moving charge produce?
Heat
A magnetic field
Opposes any change in the current flowing in a circuit
Electromagnetic field

20. What is the term for two or more cells attached together?
Start with the band on the end and read to the center
Moving vehicles
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Battery

21. What is insulation resistance?
10
Electrical resistance against the flow of current
--^V^V^V^---
First digit is 9

22. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
Area and spacing of capacitor - static current in the capacitor(both A and B)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Opposition to movement of free electrons

23. What is another name for an inductor?
How much potential difference can a material withstand before breaking down
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Choke
Stranded

24. How do you read resistor color codes?
Produce heat - light - or limit current to control it(all of the above)
Start with the band on the end and read to the center
Gauge number
Does not move

25. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
The direction the negative charge moves
50 Ohms
Voltage

26. What is a conductor?
Heat and current control(both a and c)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Tolerence
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)

27. What does an object have if a magnetic field acts on it?
First digit is 9
Magnetic properties
Gauge number
Heat

28. What cannot be transformed to higher or lower potential differences?
DC current
A difference in potential energy
1 watt
Potential difference

29. What is resistance in electrical terms?
Cell
Opposition to electrical current
Cables
--^V^V^V^---

30. What is a common measure of wire diameter?
Gauge number
Cells can be connected together to make a battery
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Moving vehicles

31. What is a characteristic of a fixed resistor?
Symbol
Secondary cell
Parallel
Resistance value can not be changed

32. What is true about a dry cell?
Volts
Common - not rechargable - gradually discharges when in storage(All of the above)
Heat
Secondary cell

33. What is power?
15 -000 ohms - 20%
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Parallel circuit
The rate of doing work

34. What is a common cause of static electricity in a shop?
Moving vehicles
Serial
The direction of the magnetic field
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

35. What does a first band of white mean?
First digit is 9
By their covering
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

36. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Electrical resistance against the flow of current
Ability to store an electric charge
Unlike poles attract
20%

37. What is a way to classify wires and cables?
Electromagnetic field
Electromagnetism
Start with the band on the end and read to the center
By their covering

38. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
1/1000th of an inch
10
50 Ohms
DC flows continuously in one direction and AC potential difference and current both change direction

39. What is a characteristic of insulators?
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)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Cell
Insulation resistance and Dielectric strength(Both A and B)

40. 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
Cells can be connected together to make a battery
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
75 Ohms
From the negative battery terminal to the positive terminal

41. What determines the resistance of a resistor?
Silver
Parallel
Composition of the resistor
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

42. What do junction boxes protect?
Start with the band on the end and read to the center
Energy
Electromagnetic field
Wire splices

43. What can permanently break down a capacitor?
Resistance increases as the conductor length increases
Breakdown voltage
Electromagnetism
Silver

44. How is the heat production measured in a resistor?
Bonding and grounding
Potential difference - E*I - current times current change from point to point(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
1/1000th of an inch

45. What is induction?
Current change in a coil creates a magnetic change
Electromagnetism
The relationship of potential difference to current
DC current

46. The thermocouple uses which method for creating potential energy?
15 -000 ohms - 20%
Heat
Cell
Bare - covered - insulated - stranded - cable(All of the above)

47. The dry cell is what method for creating 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)
Heat
Purging
Chemical action

48. What is the term for doing work at the rate of joule per second?
First digit is 9
Does not move
Series circuit
1 watt

49. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
1/1000th of an inch
Mutual induction
Porcelain
10

50. Which of the following is a type of resistor?
Purging
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Fixed - tapped - variable(all of the above)
Plastic - Rubber - Friction(all of the above)