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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. Where do the fingers point in both Left-Hand Rules?
Potential difference - E*I - current times current change from point to point(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
The direction of the magnetic field

2. What does Ohm's Law represent?
Relationship between current and potential difference
Wire splices
Electromagnetic field
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

3. What does static electricity do?
Does not move
High resistance
10%
How much potential difference can a material withstand before breaking down

4. The generator is what method of creating potential energy?
Purging
Electromagnetism
Moving vehicles
The relationship of potential difference to current

5. What is insulation resistance?
Alternating current
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Electrical resistance against the flow of current
The relationship of potential difference to current

6. What does a third band of brown mean?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Relationship between current and potential difference
10
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)

7. What does a moving charge produce?
10
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Insulation resistance
A magnetic field

8. What is the relationship between cells and batteries?
Ohms
Serial
Cells can be connected together to make a battery
Opposes any change in the current flowing in a circuit

9. What is capacitance in electrical terms?
Stranded
Porcelain
Ability to store an electric charge
The rate of doing work

10. 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
Cables
Area and spacing of capacitor - static current in the capacitor(both A and B)
75 Ohms
Silver

11. What cannot be transformed to higher or lower potential differences?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
DC current
First digit is 9
Heat

12. What are the common units of measurement for round and square conductor cross - sections?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Circular and square mills(Both A and B)
50 Ohms
Relationship between current and potential difference

13. What is a way to classify wires and cables?
Unlike poles attract
Parallel circuit
Energy
By their covering

14. What is an electromagnet?
Wire splices
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
The rate of doing work
1 watt

15. What is the type of cable composed of many fine wires?
Current change in a coil creates a magnetic change
Moving vehicles
Cables
Stranded

16. What is the use of the electromagnet?
Insulation resistance
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)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
--^V^V^V^---

17. What is the name for electrical resistance of insulation?
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)
Insulation resistance
Circular and square mills(Both A and B)
Breakdown voltage

18. What do electrical charges need to cause a fire or explosion?
Does not move
Voltage
DC flows continuously in one direction and AC potential difference and current both change direction
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

19. What is the measure of potential difference?
Volts
Secondary cell
Ability to store an electric charge
Voltage

20. What type of circuit has one path of follow through a load?
Choke
Heat
DC flows continuously in one direction and AC potential difference and current both change direction
Series circuit

21. What is the basic law of magnetic force?
Potential difference
Unlike poles attract
Solenoid and Relay(both A and B)
75 Ohms

22. What are the two generic methods to eliminate static electricity from metal objects?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Bonding and grounding
DC flows continuously in one direction and AC potential difference and current both change direction
1 watt

23. When does a DC circuit oppose current flow?
First digit is 9
1 watt
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
--^V^V^V^---

24. What determines the resistance of a resistor?
50 Ohms
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Composition of the resistor
Opposition to electrical current

25. What is the purpose of resistors in electrical circuits?
Resistance increases as the conductor length increases
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Cables
Produce heat - light - or limit current to control it(all of the above)

26. How is capacitance determined?
Area and spacing of capacitor - static current in the capacitor(both A and B)
High resistance
The relationship of potential difference to current
Opposition to electrical current

27. To what measurement do the conductor mills refer?
1/1000th of an inch
Volts
12 volts
Electromagnetic field

28. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Magnetic properties
10%

29. What is another name for an inductor?
Potential difference
Voltage
Choke
Electromagnetism

30. What is power?
Strength of the charge
Secondary cell
The rate of doing work
Potential difference

31. What do transducers do in electrical terms?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Use an effect to produce another effect
By their covering

32. What is a property of inductors in electrical circuits?
Bonding and grounding
Opposes any change in the current flowing in a circuit
Use an effect to produce another effect
First digit

33. What is dielectric strength?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
How much potential difference can a material withstand before breaking down
Volts
Two

34. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Serial
First digit is 9
Fixed - Electrolytic - Variable(all of the above)

35. In most applications - what remains constant if the current remains constant and flows in one direction?
Choke
1/1000th of an inch
Bonding and grounding
Electromagnetic field

36. How many kinds of poles do magnets have?
Series circuit
Volts
Two
Battery

37. When reading resistance color codes - what does the fourth band indicate?
The direction of the magnetic field
5%
Alternating current
Tolerence

38. What is a characteristic of insulators?
Circular and square mills(Both A and B)
Battery
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Plastic - Rubber - Friction(all of the above)

39. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
1/1000th of an inch
Two
Chemical action
Parallel

40. What wire measurement is commonly used in the U.S.?
Electromagnetism
American wire gauge(AWG)
Common - not rechargable - gradually discharges when in storage(All of the above)
How much potential difference can a material withstand before breaking down

41. What is a conductor?
Magnetic properties
Stores electrical charge
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Breakdown voltage

42. What makes electrons flow?
Potential difference
Current flows in one direction - potential differences across a load does not change(Both A and B)
Fixed - Electrolytic - Variable(all of the above)
1/1000th of an inch

43. What is an arrangement of materials that create a potential difference by chemistry?
Voltmeter
Insulation resistance
Cell
75 Ohms

44. What does a first band of white mean?
5%
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
First digit is 9
Opposition to movement of free electrons

45. What makes electrons flow?
Potential difference
--^V^V^V^---
Gauge number
Secondary cell

46. What is a wire classification?
Bare - covered - insulated - stranded - cable(All of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Stores electrical charge
First digit

47. 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
Amperes
The direction the negative charge moves
Fixed - tapped - variable(all of the above)
12 volts

48. What is the purpose of capacitors in electrical circuits?
Resistance value can not be changed
Strength of the charge
Cables
Stores electrical charge

49. Which of the following materials is NOT a good conductor?
First digit
Porcelain
Parallel
Opposition to movement of free electrons

50. What instrument measures voltage?
Heat
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
1 watt
Voltmeter