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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 does a moving charge produce?
Voltmeter
Composition of the resistor
A magnetic field
Area and spacing of capacitor - static current in the capacitor(both A and B)

2. What is a common measure of wire diameter?
15 -000 ohms - 20%
Start with the band on the end and read to the center
Porcelain
Gauge number

3. What is a conductor?
Electromagnetism
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Heat
Symbol

4. How is capacitance determined?
Bonding and grounding
75 Ohms
The direction the negative charge moves
Area and spacing of capacitor - static current in the capacitor(both A and B)

5. What is a DC circuit characteristic?
Insulation resistance and Dielectric strength(Both A and B)
Wire splices
A magnetic field
Current flows in one direction - potential differences across a load does not change(Both A and B)

6. What is induction?
Current change in a coil creates a magnetic change
Heat and current control(both a and c)
DC flows continuously in one direction and AC potential difference and current both change direction
Cells can be connected together to make a battery

7. What is the term for doing work at the rate of joule per second?
Choke
1 watt
--^V^V^V^---
First digit is 9

8. What is the purpose of capacitors in electrical circuits?
Potential difference
Stores electrical charge
Opposition to electrical current
Moving vehicles

9. What does a third band of brown mean?
10
Circular and square mills(Both A and B)
50 Ohms
Two

10. Which of the following is a type of resistor?
15 -000 ohms - 20%
Ohms
Does not move
Fixed - tapped - variable(all of the above)

11. What is voltage?
By their covering
Heat
A difference in potential energy
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

12. What is the relationship of conductor size and length to resistance?
A difference in potential energy
15 -000 ohms - 20%
Resistance increases as the conductor length increases
The direction of the magnetic field

13. What makes electrons flow?
Volts
Potential difference
Secondary cell
How much potential difference can a material withstand before breaking down

14. What is needed for electric heating elements and the filaments of light bulbs?
The relationship of potential difference to current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
High resistance
Battery

15. Identify the general blueprint symbol for inductors.
Symbol
American wire gauge(AWG)
Heat
Battery

16. Where do the fingers point in both Left-Hand Rules?
12 volts
Fixed - Electrolytic - Variable(all of the above)
Relationship between current and potential difference
The direction of the magnetic field

17. What does a transformer transform?
Symbol
The relationship of potential difference to current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Symbol

18. What instrument measures voltage?
Solenoid and Relay(both A and B)
Heat and current control(both a and c)
Voltmeter
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

19. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
DC flows continuously in one direction and AC potential difference and current both change direction
Serial
Volts

20. What is a switch that operates by electricity?
50 Ohms
Wire splices
Choke
Relay

21. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
--^V^V^V^---
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Insulation resistance and Dielectric strength(Both A and B)

22. The thermocouple uses which method for creating potential energy?
Current change in a coil creates a magnetic change
DC current
Heat
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

23. What is the unit of measurement of resistance?
Battery
Secondary cell
Ohms
Cell

24. Identify the blueprint symbol for capacitors.
Potential difference
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Symbol
Mutual induction

25. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
Energy
DC flows continuously in one direction and AC potential difference and current both change direction
Area and spacing of capacitor - static current in the capacitor(both A and B)

26. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
High resistance
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

27. What is the purpose of resistors in electrical circuits?
Electrical resistance against the flow of current
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)
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)

28. What is power?
Potential difference
The rate of doing work
10
Fixed - tapped - variable(all of the above)

29. What is a common cause of static electricity in a shop?
Purging
From the negative battery terminal to the positive terminal
Moving vehicles
Breakdown voltage

30. What do we call the ability to do work?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Electrical resistance against the flow of current
Energy
Fixed - tapped - variable(all of the above)

31. What is the term for two or more cells attached together?
Magnetic properties
Two
A magnetic field
Battery

32. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
15 -000 ohms - 20%
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
The direction of the magnetic field

33. What is resistance?
Insulation resistance
American wire gauge(AWG)
Opposition to movement of free electrons
Alternating current

34. How many kinds of poles do magnets have?
Mutual induction
Produce heat - light - or limit current to control it(all of the above)
Two
10

35. What does a first band of white mean?
Energy
Does not move
Voltage
First digit is 9

36. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Purging
Silver
Battery

37. What is resistance in electrical terms?
Parallel
Opposition to electrical current
Choke
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

38. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Use an effect to produce another effect
Alternating current
High resistance

39. What can permanently break down a capacitor?
Breakdown voltage
1/1000th of an inch
Bonding and grounding
Grounding wire

40. What do transducers do in electrical terms?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Heat
Electromagnetic field
Use an effect to produce another effect

41. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
1 watt
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Parallel
Alternating current

42. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
A difference in potential energy
Resistance increases as the conductor length increases

43. What results when current is run through a material with high resistance?
Relay
Heat and current control(both a and c)
The direction of the magnetic field
A difference in potential energy

44. What is capacitance in electrical terms?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Ability to store an electric charge
Tolerence
Unlike poles attract

45. The dry cell is what method for creating potential energy?
Plastic - Rubber - Friction(all of the above)
A difference in potential energy
Chemical action
Potential difference - E*I - current times current change from point to point(all of the above)

46. A resistor is color coded brown - green - orange. What is its resistance?
15 -000 ohms - 20%
Potential difference
Heat
1 watt

47. What does an object have if a magnetic field acts on it?
Magnetic properties
Current flows in one direction - potential differences across a load does not change(Both A and B)
Unlike poles attract
Potential difference

48. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Chemical action
The direction of the magnetic field
50 Ohms
12 volts

49. What does resistance produce?
Volts
Heat
DC flows continuously in one direction and AC potential difference and current both change direction
Serial

50. What wire measurement is commonly used in the U.S.?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Voltage
American wire gauge(AWG)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

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