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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 does a moving charge produce?
Opposition to electrical current
Composition of the resistor
A magnetic field
High resistance

2. What is a conductor?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Area and spacing of capacitor - static current in the capacitor(both A and B)
DC flows continuously in one direction and AC potential difference and current both change direction

3. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
The direction the negative charge moves
Insulation resistance and Dielectric strength(Both A and B)

4. What does a third band of brown mean?
1/1000th of an inch
Start with the band on the end and read to the center
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
10

5. What is the unit of measurement of electrical current?
Amperes
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Gauge number
Fixed - Electrolytic - Variable(all of the above)

6. What is the fundamental property of insulators?
Strength of the charge
Gauge number
Does not move
Insulation resistance and Dielectric strength(Both A and B)

7. What is a type of mechanical transducer?
1/1000th of an inch
Solenoid and Relay(both A and B)
Porcelain
Electrical resistance against the flow of current

8. What is a characteristic of insulators?
Two
5%
Potential difference - E*I - current times current change from point to point(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

9. Which of the following materials is NOT a good conductor?
How much potential difference can a material withstand before breaking down
Opposition to movement of free electrons
Porcelain
Bare - covered - insulated - stranded - cable(All of the above)

10. What wire measurement is commonly used in the U.S.?
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 - E*I - current times current change from point to point(all of the above)
Volts
American wire gauge(AWG)

11. What results when current is run through a material with high resistance?
10%
Bare - covered - insulated - stranded - cable(All of the above)
Heat and current control(both a and c)
The direction of the magnetic field

12. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
Energy
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Ability to store an electric charge

13. What is voltage?
Heat
A difference in potential energy
1/1000th of an inch
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

14. What is a rigid metal conduit?
10%
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Wire splices
Secondary cell

15. What is true about a dry cell?
10
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Fixed - tapped - variable(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

16. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Start with the band on the end and read to the center
Insulation resistance
Alternating current
Electromagnetism

17. Why is the transformer important to AC electricity?

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18. How is capacitance determined?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Two
Insulation resistance and Dielectric strength(Both A and B)
Ohms

19. What does Ohm's Law represent?
A magnetic field
Ability to store an electric charge
Grounding wire
Relationship between current and potential difference

20. What is dielectric strength?
A difference in potential energy
Composition of the resistor
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
How much potential difference can a material withstand before breaking down

21. What is a type of capacitor?
Ohms
Fixed - Electrolytic - Variable(all of the above)
Cables
Opposition to movement of free electrons

22. To what measurement do the conductor mills refer?
Use an effect to produce another effect
Breakdown voltage
Stores electrical charge
1/1000th of an inch

23. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Use an effect to produce another effect
Voltage
Choke

24. What is capacitance in electrical terms?
Stranded
Volts
Ability to store an electric charge
Mutual induction

25. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
From the negative battery terminal to the positive terminal
Mutual induction
Ohms
Energy

26. What is the type of cable composed of many fine wires?
High resistance
Use an effect to produce another effect
Stranded
By their covering

27. Which material has the lowest resistance at ordinary temperatures?
Silver
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Ability to store an electric charge
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

28. Which of the following is a type of resistor?
10
Breakdown voltage
Fixed - tapped - variable(all of the above)
By their covering

29. 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
The direction the negative charge moves
75 Ohms
How much potential difference can a material withstand before breaking down
Chemical action

30. What is the measure of potential difference?
Electromagnetism
Volts
Mutual induction
Secondary cell

31. Identify the blueprint symbol for capacitors.
Battery
Stranded
Symbol
Magnetic properties

32. What is the basic law of magnetic force?
Parallel
Alternating current
Unlike poles attract
American wire gauge(AWG)

33. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Mutual induction
Strength of the charge
The direction the negative charge moves

34. What is insulation resistance?
Fixed - tapped - variable(all of the above)
A difference in potential energy
Electrical resistance against the flow of current
By their covering

35. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
1/1000th of an inch
Resistance value can not be changed
Electrical resistance against the flow of current

36. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Chemical action
50 Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Start with the band on the end and read to the center

37. What is a way to classify wires and cables?
Stores electrical charge
By their covering
5%
1/1000th of an inch

38. What are the common units of measurement for round and square conductor cross - sections?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Circular and square mills(Both A and B)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Heat

39. What does static electricity do?
Gauge number
Does not move
Fixed - tapped - variable(all of the above)
Fixed - Electrolytic - Variable(all of the above)

40. How is the heat production measured in a resistor?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Choke
Potential difference - E*I - current times current change from point to point(all of the above)
Electrical resistance against the flow of current

41. What is an arrangement of materials that create a potential difference by chemistry?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Strength of the charge
Cell

42. What does an object have if a magnetic field acts on it?
The relationship of potential difference to current
Parallel circuit
Electrical resistance against the flow of current
Magnetic properties

43. When reading resistance color codes - what does the first band indicate?
Potential difference - E*I - current times current change from point to point(all of the above)
Electromagnetism
First digit
From the negative battery terminal to the positive terminal

44. A resistor is color coded brown - green - orange. What is its resistance?
15 -000 ohms - 20%
American wire gauge(AWG)
Breakdown voltage
--^V^V^V^---

45. What is another name for an inductor?
Volts
Choke
How much potential difference can a material withstand before breaking down
Bonding and grounding

46. What can permanently break down a capacitor?
Stranded
Insulation resistance
Breakdown voltage
Relationship between current and potential difference

47. What is power?
From the negative battery terminal to the positive terminal
Circular and square mills(Both A and B)
The rate of doing work
Relay

48. What is the term for doing work at the rate of joule per second?
1 watt
Silver
Symbol
Relationship between current and potential difference

49. What does a first band of white mean?
Bare - covered - insulated - stranded - cable(All of the above)
Purging
First digit is 9
The direction the negative charge moves

50. How do you read resistor color codes?
Start with the band on the end and read to the center
Stranded
Serial
Relationship between current and potential difference