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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. When reading resistance color codes - what does the first band indicate?
Silver
Heat
First digit
15 -000 ohms - 20%

2. What is an arrangement of materials that create a potential difference by chemistry?
Current change in a coil creates a magnetic change
Cell
Stores electrical charge
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

3. What does static electricity do?
Alternating current
The rate of doing work
Does not move
Potential difference

4. Which of the following is a type of resistor?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Fixed - tapped - variable(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
Silver

5. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Alternating current
From the negative battery terminal to the positive terminal
A magnetic field
Electrical resistance against the flow of current

6. What information do the Left-Hand Rules provide?
Porcelain
Opposition to movement of free electrons
Use an effect to produce another effect
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

7. Which way is the current going in the circuit shown?(electron flow)
High resistance
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Choke
From the negative battery terminal to the positive terminal

8. What is an electromagnet?
12 volts
10
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
By their covering

9. What is insulation resistance?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Parallel circuit
Electrical resistance against the flow of current
High resistance

10. What is a rigid metal conduit?
Voltage
Heat
Insulation resistance and Dielectric strength(Both A and B)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

11. What is the relationship of conductor size and length to resistance?
Insulation resistance and Dielectric strength(Both A and B)
Produce heat - light - or limit current to control it(all of the above)
Unlike poles attract
Resistance increases as the conductor length increases

12. What is the relationship between magnetism and electricity?
Plastic - Rubber - Friction(all of the above)
The direction of the magnetic field
Gauge number
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)

13. When reading resistance color codes - what does the fourth band indicate?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Opposition to electrical current
Tolerence
Breakdown voltage

14. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
The rate of doing work
Serial
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

15. What is the term for two or more cells attached together?
Battery
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)
Symbol

16. What is the basic law of magnetic force?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Tolerence
Alternating current
Unlike poles attract

17. What is true about a dry cell?
Parallel
Fixed - tapped - variable(all of the above)
Does not move
Common - not rechargable - gradually discharges when in storage(All of the above)

18. The generator is what method of creating potential energy?
12 volts
Ohms
Electromagnetism
Purging

19. What is a property of inductors in electrical circuits?
Circular and square mills(Both A and B)
Tolerence
Opposes any change in the current flowing in a circuit
Chemical action

20. What is a switch that operates by electricity?
Start with the band on the end and read to the center
Gauge number
Relay
Heat

21. Which material has the lowest resistance at ordinary temperatures?
Silver
1 watt
Composition of the resistor
Strength of the charge

22. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
12 volts
Ohms
Produce heat - light - or limit current to control it(all of the above)

23. What does a moving charge produce?
Wire splices
A magnetic field
Cell
Opposes any change in the current flowing in a circuit

24. What is induction?
Current change in a coil creates a magnetic change
Porcelain
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
The relationship of potential difference to current

25. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
Electromagnetic field
A difference in potential energy
Cables

26. What makes electrons flow?
Potential difference
First digit
Moving vehicles
Cables

27. What instrument measures voltage?
Gauge number
5%
Voltmeter
Opposition to electrical current

28. What does an object have if a magnetic field acts on it?
10
From the negative battery terminal to the positive terminal
Current change in a coil creates a magnetic change
Magnetic properties

29. What are the names of two of the six primary methods of producing a voltage?
Volts
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Strength of the charge
Grounding wire

30. What are the two generic methods to eliminate static electricity from metal objects?
Produce heat - light - or limit current to control it(all of the above)
Bonding and grounding
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Use an effect to produce another effect

31. How do you read resistor color codes?
Start with the band on the end and read to the center
Current flows in one direction - potential differences across a load does not change(Both A and B)
The relationship of potential difference to current
Unlike poles attract

32. What do we call the ability to do work?
Energy
Insulation resistance and Dielectric strength(Both A and B)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
By their covering

33. What type of circuit has one path of follow through a load?
1 watt
Series circuit
Voltage
1/1000th of an inch

34. What is a type of capacitor?
Start with the band on the end and read to the center
Breakdown voltage
Fixed - Electrolytic - Variable(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

35. Identify the blueprint symbol for resistors.
Voltmeter
Current flows in one direction - potential differences across a load does not change(Both A and B)
Relay
--^V^V^V^---

36. Where does the thumb point in both Left-Hand Rules?
Unlike poles attract
Relationship between current and potential difference
The direction the negative charge moves
Opposition to electrical current

37. What are the common units of measurement for round and square conductor cross - sections?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Circular and square mills(Both A and B)
Insulation resistance and Dielectric strength(Both A and B)
The direction of the magnetic field

38. What is a common cause of static electricity in a shop?
Heat
Heat
Relationship between current and potential difference
Moving vehicles

39. What do transducers do in electrical terms?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Use an effect to produce another effect
Battery

40. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Ability to store an electric charge
Fixed - tapped - variable(all of the above)
Solenoid and Relay(both A and B)
Parallel

41. 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)
Potential difference - E*I - current times current change from point to point(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)

42. How do static charges distribute themselves?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Composition of the resistor
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
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)

43. What determines the resistance of a resistor?
75 Ohms
Composition of the resistor
Plastic - Rubber - Friction(all of the above)
20%

44. What can permanently break down a capacitor?
American wire gauge(AWG)
Serial
Silver
Breakdown voltage

45. What is a way to classify wires and cables?
By their covering
1/1000th of an inch
Potential difference
Serial

46. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
Secondary cell
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

47. What is the measure of potential difference?
Volts
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Resistance increases as the conductor length increases
Electromagnetism

48. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Mutual induction
Insulation resistance and Dielectric strength(Both A and B)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

49. What is a common measure of wire diameter?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Relationship between current and potential difference
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Gauge number

50. What cannot be transformed to higher or lower potential differences?
Symbol
Series circuit
High resistance
DC current