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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. The dry cell is what method for creating potential energy?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Opposes any change in the current flowing in a circuit
Chemical action
Volts

2. Identify the general blueprint symbol for inductors.
How much potential difference can a material withstand before breaking down
Symbol
Current flows in one direction - potential differences across a load does not change(Both A and B)
Stranded

3. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Chemical action
1 watt
Energy
Parallel

4. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
Potential difference - E*I - current times current change from point to point(all of the above)
Stores electrical charge
First digit

5. What do we call the ability to do work?
Energy
Voltmeter
Cell
The direction the negative charge moves

6. How many kinds of poles do magnets have?
Electromagnetic field
Current flows in one direction - potential differences across a load does not change(Both A and B)
Two
Cell

7. How is capacitance determined?
Grounding wire
Alternating current
Area and spacing of capacitor - static current in the capacitor(both A and B)
Potential difference

8. What is the unit of measurement of resistance?
Resistance increases as the conductor length increases
Ohms
Relationship between current and potential difference
Heat

9. What is a common cause of static electricity in a shop?
Plastic - Rubber - Friction(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
The direction the negative charge moves
Moving vehicles

10. 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)
Start with the band on the end and read to the center
Cells can be connected together to make a battery
DC flows continuously in one direction and AC potential difference and current both change direction

11. How do you read resistor color codes?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Insulation resistance
Ability to store an electric charge
Start with the band on the end and read to the center

12. What is true about a dry cell?
Parallel
Stranded
Moving vehicles
Common - not rechargable - gradually discharges when in storage(All of the above)

13. What is insulation resistance?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Electrical resistance against the flow of current
Cell
First digit is 9

14. What is an arrangement of materials that create a potential difference by chemistry?
Heat
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Voltmeter
Cell

15. Why is the transformer important to AC electricity?

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16. What information do the Left-Hand Rules provide?
First digit is 9
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Relay
Heat and current control(both a and c)

17. What is the term for two or more cells attached together?
Volts
A magnetic field
Produce heat - light - or limit current to control it(all of the above)
Battery

18. What does a moving charge produce?
Bonding and grounding
A magnetic field
Fixed - tapped - variable(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction

19. What is induction?
Current change in a coil creates a magnetic change
20%
Composition of the resistor
First digit is 9

20. Where do the fingers point in both Left-Hand Rules?
Porcelain
The direction of the magnetic field
DC flows continuously in one direction and AC potential difference and current both change direction
Use an effect to produce another effect

21. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Heat
Electromagnetism
Produce heat - light - or limit current to control it(all of the above)
5%

22. 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
12 volts
Plastic - Rubber - Friction(all of the above)
Relationship between current and potential difference
High resistance

23. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Porcelain
Heat and current control(both a and c)
Current flows in one direction - potential differences across a load does not change(Both A and B)
20%

24. What is resistance in electrical terms?
Opposition to electrical current
Two
Cells can be connected together to make a battery
Common - not rechargable - gradually discharges when in storage(All of the above)

25. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Purging
A difference in potential energy
Heat

26. What is another name for an inductor?
Choke
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)
Bonding and grounding
Relay

27. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Cell
Parallel circuit
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

28. What is the purpose of resistors in electrical circuits?
Heat
Gauge number
Produce heat - light - or limit current to control it(all of the above)
Solenoid and Relay(both A and B)

29. What does a first band of white mean?
First digit is 9
12 volts
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
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)

30. What determines whether a spark can be produced?
Heat and current control(both a and c)
Porcelain
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Strength of the charge

31. What are the common units of measurement for round and square conductor cross - sections?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Stores electrical charge
Chemical action
Circular and square mills(Both A and B)

32. When reading resistance color codes - what does the first band indicate?
1/1000th of an inch
First digit
From the negative battery terminal to the positive terminal
Composition of the resistor

33. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Voltmeter
Mutual induction
A difference in potential energy
Plastic - Rubber - Friction(all of the above)

34. Which type of cell can be recharged?
Secondary cell
Two
Current change in a coil creates a magnetic change
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

35. What is needed for electric heating elements and the filaments of light bulbs?
Ohms
Produce heat - light - or limit current to control it(all of the above)
Battery
High resistance

36. What type of circuit has two or more paths for current to follow?
Parallel circuit
Relationship between current and potential difference
Bare - covered - insulated - stranded - cable(All of the above)
Opposition to movement of free electrons

37. What is the purpose of capacitors in electrical circuits?
Magnetic properties
Stores electrical charge
Current flows in one direction - potential differences across a load does not change(Both A and B)
Grounding wire

38. In most applications - what remains constant if the current remains constant and flows in one direction?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Resistance value can not be changed
12 volts
Electromagnetic field

39. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Magnetic properties
Moving vehicles
Alternating current
Stranded

40. What is a switch that operates by electricity?
Serial
Potential difference
First digit
Relay

41. Which material has the lowest resistance at ordinary temperatures?
Ability to store an electric charge
Stranded
Silver
Cells can be connected together to make a battery

42. What is a way to classify wires and cables?
From the negative battery terminal to the positive terminal
American wire gauge(AWG)
By their covering
A magnetic field

43. What can permanently break down a capacitor?
50 Ohms
Serial
Breakdown voltage
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

44. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Potential difference - E*I - current times current change from point to point(all of the above)
How much potential difference can a material withstand before breaking down
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

45. What is a wire classification?
Electromagnetic field
Bare - covered - insulated - stranded - cable(All of the above)
Gauge number
First digit

46. What cannot be transformed to higher or lower potential differences?
DC current
Silver
Potential difference - E*I - current times current change from point to point(all of the above)
American wire gauge(AWG)

47. What is power?
Area and spacing of capacitor - static current in the capacitor(both A and B)
The rate of doing work
A magnetic field
How much potential difference can a material withstand before breaking down

48. The generator is what method of creating potential energy?
The direction the negative charge moves
Electromagnetism
Wire splices
Moving vehicles

49. Identify the blueprint symbol for capacitors.
Symbol
Bonding and grounding
First digit
Composition of the resistor

50. What does an object have if a magnetic field acts on it?
Heat
5%
Magnetic properties
Purging