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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. How is capacitance determined?
Electromagnetic field
Voltmeter
Amperes
Area and spacing of capacitor - static current in the capacitor(both A and B)

2. What is a type of mechanical transducer?
High resistance
10%
From the negative battery terminal to the positive terminal
Solenoid and Relay(both A and B)

3. What are the names of two of the six primary methods of producing a voltage?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Fixed - tapped - variable(all of the above)
Electromagnetism

4. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
Circular and square mills(Both A and B)
Series circuit
Relay

5. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Symbol
Does not move
Cell

6. What information do the Left-Hand Rules provide?
5%
Does not move
Produce heat - light - or limit current to control it(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

7. Which type of cell can be recharged?
The rate of doing work
Secondary cell
Opposes any change in the current flowing in a circuit
Ohms

8. What do electrical charges need to cause a fire or explosion?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Amperes
Stores electrical charge
Cables

9. What is the unit of measurement of potential difference?
Bonding and grounding
Magnetic properties
Voltmeter
Volts

10. What is another name for an inductor?
Choke
Unlike poles attract
75 Ohms
Secondary cell

11. The dry cell is what method for creating potential energy?
Chemical action
Potential difference - E*I - current times current change from point to point(all of the above)
Produce heat - light - or limit current to control it(all of the above)
Battery

12. 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
Fixed - Electrolytic - Variable(all of the above)
Plastic - Rubber - Friction(all of the above)
20%

13. What is dielectric strength?
How much potential difference can a material withstand before breaking down
10
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Fixed - tapped - variable(all of the above)

14. What is voltage?
Gauge number
Volts
DC current
A difference in potential energy

15. What is the fundamental property of insulators?
Voltmeter
Insulation resistance and Dielectric strength(Both A and B)
Bare - covered - insulated - stranded - cable(All of the above)
Magnetic properties

16. What is the term for two or more cells attached together?
By their covering
The direction of the magnetic field
Battery
Start with the band on the end and read to the center

17. A resistor is color coded brown - green - orange. What is its resistance?
Electrical resistance against the flow of current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
15 -000 ohms - 20%
Cells can be connected together to make a battery

18. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
How much potential difference can a material withstand before breaking down
Chemical action
Heat
10%

19. What makes electrons flow?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)
Magnetic properties
Potential difference

20. What does a moving charge produce?
A magnetic field
Heat
The relationship of potential difference to current
Purging

21. 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)
High resistance
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

22. What type of circuit has one path of follow through a load?
First digit is 9
Heat
Tolerence
Series circuit

23. What does resistance produce?
12 volts
Electrical resistance against the flow of current
10%
Heat

24. What is resistance in electrical terms?
Electromagnetism
Opposition to electrical current
Opposition to movement of free electrons
Electrical resistance against the flow of current

25. What is an arrangement of materials that create a potential difference by chemistry?
Grounding wire
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)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Cell

26. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
12 volts
Volts
Does not move

27. What is the basic law of magnetic force?
15 -000 ohms - 20%
Unlike poles attract
5%
Electromagnetism

28. What is the term for doing work at the rate of joule per second?
1 watt
Heat
5%
Area and spacing of capacitor - static current in the capacitor(both A and B)

29. The generator is what method of creating potential energy?
High resistance
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Electrical resistance against the flow of current
Electromagnetism

30. What is induction?
Plastic - Rubber - Friction(all of the above)
5%
Current change in a coil creates a magnetic change
Tolerence

31. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
Voltage
Energy
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

32. What determines whether a spark can be produced?
Strength of the charge
12 volts
Electromagnetism
Start with the band on the end and read to the center

33. What is a conductor?
Produce heat - light - or limit current to control it(all of the above)
Energy
Ohms
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

34. What is the type of cable composed of many fine wires?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
10%
Stranded
A difference in potential energy

35. How do you read resistor color codes?
Strength of the charge
Start with the band on the end and read to the center
DC flows continuously in one direction and AC potential difference and current both change direction
Parallel

36. What does Ohm's Law represent?
Resistance value can not be changed
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 and current control(both a and c)
Relationship between current and potential difference

37. What must be large enough to carry the largest current likely to occur?
Grounding wire
Circular and square mills(Both A and B)
The direction of the magnetic field
Produce heat - light - or limit current to control it(all of the above)

38. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
Grounding wire
Strength of the charge
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

39. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
Fixed - tapped - variable(all of the above)
Chemical action
Porcelain

40. What does a transformer transform?
The relationship of potential difference to current
Potential difference - E*I - current times current change from point to point(all of the above)
Fixed - tapped - variable(all of the above)
20%

41. What type of circuit has two or more paths for current to follow?
The direction of the magnetic field
1/1000th of an inch
Stranded
Parallel circuit

42. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Unlike poles attract
Breakdown voltage
DC flows continuously in one direction and AC potential difference and current both change direction

43. When does a DC circuit oppose current flow?
Volts
Parallel
Heat
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

44. The thermocouple uses which method for creating potential energy?
Heat
Use an effect to produce another effect
Cell
Serial

45. Which of the following is a type of resistor?
Electromagnetism
Fixed - tapped - variable(all of the above)
Opposition to electrical current
Relationship between current and potential difference

46. To what measurement do the conductor mills refer?
Use an effect to produce another effect
Potential difference - E*I - current times current change from point to point(all of the above)
Silver
1/1000th of an inch

47. Where does the thumb point in both Left-Hand Rules?
15 -000 ohms - 20%
The direction the negative charge moves
Cells can be connected together to make a battery
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

48. When reading resistance color codes - what does the fourth band indicate?
A magnetic field
Opposes any change in the current flowing in a circuit
Moving vehicles
Tolerence

49. What is the purpose of a raceway?
Secondary cell
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
1 watt
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

50. Identify the general blueprint symbol for inductors.
Relationship between current and potential difference
Symbol
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)