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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 needed for electric heating elements and the filaments of light bulbs?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
1/1000th of an inch
Potential difference
High resistance

2. What is induction?
50 Ohms
10
Porcelain
Current change in a coil creates a magnetic change

3. The generator is what method of creating potential energy?
Electromagnetism
Heat
Voltmeter
Ohms

4. What is a characteristic of a fixed resistor?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cells can be connected together to make a battery
Resistance value can not be changed
Electromagnetic field

5. What is resistance?
Potential difference - E*I - current times current change from point to point(all of the above)
Opposition to movement of free electrons
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Breakdown voltage

6. What is the measure of potential difference?
Volts
Moving vehicles
Stranded
Voltage

7. What instrument measures voltage?
Breakdown voltage
Start with the band on the end and read to the center
Two
Voltmeter

8. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Tolerence
Stranded
75 Ohms

9. What does a third band of brown mean?
Secondary cell
Composition of the resistor
10
Parallel

10. What type of circuit has two or more paths for current to follow?
Parallel circuit
Cables
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
15 -000 ohms - 20%

11. What is the unit of measurement of resistance?
Alternating current
First digit is 9
Ohms
DC current

12. What can permanently break down a capacitor?
First digit is 9
Parallel circuit
12 volts
Breakdown voltage

13. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
The relationship of potential difference to current
10%
Energy
Amperes

14. What is a type of capacitor?
Strength of the charge
Fixed - Electrolytic - Variable(all of the above)
How much potential difference can a material withstand before breaking down
Unlike poles attract

15. When reading resistance color codes - what does the first band indicate?
Opposition to movement of free electrons
First digit
1/1000th of an inch
Secondary cell

16. What do transducers do in electrical terms?
75 Ohms
Use an effect to produce another effect
Amperes
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)

17. What is the name for electrical resistance of insulation?
Insulation resistance
Relationship between current and potential difference
Volts
Symbol

18. What is dielectric strength?
Relay
75 Ohms
Moving vehicles
How much potential difference can a material withstand before breaking down

19. What does a first band of white mean?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
First digit is 9

20. What does a transformer transform?
Tolerence
Alternating current
Insulation resistance and Dielectric strength(Both A and B)
The relationship of potential difference to current

21. What is a common cause of static electricity in a shop?
1/1000th of an inch
Use an effect to produce another effect
Breakdown voltage
Moving vehicles

22. What makes electrons flow?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Grounding wire
Potential difference
Heat

23. Which of the following is a type of resistor?
10%
Fixed - tapped - variable(all of the above)
First digit is 9
Resistance increases as the conductor length increases

24. When does a DC circuit oppose current flow?
Resistance increases as the conductor length increases
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Symbol
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

25. What are the names of two of the six primary methods of producing a voltage?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Serial
American wire gauge(AWG)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

26. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
Volts
How much potential difference can a material withstand before breaking down
Area and spacing of capacitor - static current in the capacitor(both A and B)

27. What is a property of inductors in electrical circuits?
By their covering
Opposes any change in the current flowing in a circuit
Strength of the charge
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

28. To what measurement do the conductor mills refer?
Start with the band on the end and read to the center
Resistance value can not be changed
1/1000th of an inch
Alternating current

29. 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)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
First digit
Potential difference

30. What is true about a dry cell?
Current flows in one direction - potential differences across a load does not change(Both A and B)
--^V^V^V^---
Common - not rechargable - gradually discharges when in storage(All of the above)
Series circuit

31. How is capacitance determined?
Cables
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Volts

32. The dry cell is what method for creating potential energy?
Potential difference - E*I - current times current change from point to point(all of the above)
Chemical action
1/1000th of an inch
Serial

33. What is the relationship of conductor size and length to resistance?
Stranded
Resistance increases as the conductor length increases
Fixed - tapped - variable(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

34. What is the purpose of capacitors in electrical circuits?
15 -000 ohms - 20%
Stores electrical charge
Wire splices
Use an effect to produce another effect

35. What is an arrangement of materials that create a potential difference by chemistry?
The rate of doing work
Cell
5%
Strength of the charge

36. What are the common units of measurement for round and square conductor cross - sections?
1/1000th of an inch
Tolerence
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Circular and square mills(Both A and B)

37. What is the purpose of resistors in electrical circuits?
Bare - covered - insulated - stranded - cable(All of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Volts
Produce heat - light - or limit current to control it(all of the above)

38. What is the type of cable composed of many fine wires?
Stranded
Current change in a coil creates a magnetic change
Voltage
1 watt

39. How do you read resistor color codes?
Circular and square mills(Both A and B)
Start with the band on the end and read to the center
Common - not rechargable - gradually discharges when in storage(All of the above)
The direction of the magnetic field

40. Which material has the lowest resistance at ordinary temperatures?
Silver
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Gauge number
Current change in a coil creates a magnetic change

41. What is the fundamental property of insulators?
Use an effect to produce another effect
Insulation resistance and Dielectric strength(Both A and B)
Volts
A difference in potential energy

42. Identify the general blueprint symbol for inductors.
The relationship of potential difference to current
Potential difference - E*I - current times current change from point to point(all of the above)
The direction of the magnetic field
Symbol

43. What is a characteristic of insulators?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Stores electrical charge
Electrical resistance against the flow of current

44. Why is the transformer important to AC electricity?

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45. What information do the Left-Hand Rules provide?
Voltmeter
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
First digit is 9
Opposes any change in the current flowing in a circuit

46. What do junction boxes protect?
High resistance
Wire splices
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Heat

47. Identify the blueprint symbol for capacitors.
Wire splices
15 -000 ohms - 20%
Does not move
Symbol

48. Where does the thumb point in both Left-Hand Rules?
Electromagnetism
The direction the negative charge moves
1 watt
Magnetic properties

49. What type of circuit has one path of follow through a load?
Series circuit
Strength of the charge
Secondary cell
How much potential difference can a material withstand before breaking down

50. What do we call the ability to do work?
Silver
Energy
Solenoid and Relay(both A and B)
Opposes any change in the current flowing in a circuit