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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 a conductor?
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)
Voltmeter
Current flows in one direction - potential differences across a load does not change(Both A and B)

2. What is a way to classify wires and cables?
Chemical action
5%
By their covering
Series circuit

3. What does static electricity do?
Use an effect to produce another effect
Relationship between current and potential difference
Tolerence
Does not move

4. What is another name for an inductor?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Choke
American wire gauge(AWG)
1/1000th of an inch

5. What does Ohm's Law represent?
Tolerence
Current flows in one direction - potential differences across a load does not change(Both A and B)
Relationship between current and potential difference
Energy

6. What is the name for electrical resistance of insulation?
Ohms
Breakdown voltage
Insulation resistance
Grounding wire

7. What makes electrons flow?
Bare - covered - insulated - stranded - cable(All of the above)
Unlike poles attract
Potential difference
Silver

8. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Battery
A magnetic field
Moving vehicles

9. Which way is the current going in the circuit shown?(electron flow)
Relay
Ability to store an electric charge
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
From the negative battery terminal to the positive terminal

10. What is needed for electric heating elements and the filaments of light bulbs?
How much potential difference can a material withstand before breaking down
Insulation resistance and Dielectric strength(Both A and B)
High resistance
Chemical action

11. The dry cell is what method for creating potential energy?
Chemical action
Two
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Opposition to movement of free electrons

12. What is the unit of measurement of electrical current?
Amperes
Bonding and grounding
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Resistance increases as the conductor length increases

13. What results when current is run through a material with high resistance?
Voltage
Heat and current control(both a and c)
Opposition to electrical current
High resistance

14. What are the names of two of the six primary methods of producing a voltage?
Silver
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Insulation resistance
1 watt

15. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
1 watt
Stores electrical charge
DC current

16. What type of circuit has two or more paths for current to follow?
Parallel circuit
Heat
First digit
Voltage

17. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Choke
Two

18. What is a characteristic of insulators?
Opposition to movement of free electrons
A difference in potential energy
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Cells can be connected together to make a battery

19. What is the relationship between magnetism and electricity?
Stranded
Purging
The rate of doing work
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)

20. When does a DC circuit oppose current flow?
Common - not rechargable - gradually discharges when in storage(All of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
High resistance

21. What do transducers do in electrical terms?
Heat
Use an effect to produce another effect
Silver
Amperes

22. What is the unit of measurement of resistance?
The direction the negative charge moves
Symbol
Relay
Ohms

23. Where do the fingers point in both Left-Hand Rules?
Unlike poles attract
Electromagnetic field
Ability to store an electric charge
The direction of the magnetic field

24. What does a moving charge produce?
A magnetic field
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Breakdown voltage
Opposition to movement of free electrons

25. What makes electrons flow?
Potential difference
Fixed - tapped - variable(all of the above)
Battery
10

26. What instrument measures voltage?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Voltmeter
Symbol
Unlike poles attract

27. What is the term for two or more cells attached together?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Battery
Insulation resistance and Dielectric strength(Both A and B)
Tolerence

28. Why is the transformer important to AC electricity?

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29. What is the fundamental property of insulators?
High resistance
Insulation resistance and Dielectric strength(Both A and B)
5%
Potential difference

30. What does an object have if a magnetic field acts on it?
Magnetic properties
Insulation resistance and Dielectric strength(Both A and B)
Chemical action
Purging

31. When reading resistance color codes - what does the fourth band indicate?
Circular and square mills(Both A and B)
High resistance
Opposition to electrical current
Tolerence

32. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
--^V^V^V^---
Electromagnetism
Energy

33. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
First digit is 9
Circular and square mills(Both A and B)
50 Ohms
American wire gauge(AWG)

34. What is the unit of measurement of potential difference?
Circular and square mills(Both A and B)
Secondary cell
Volts
Electromagnetism

35. To what measurement do the conductor mills refer?
1/1000th of an inch
Porcelain
Energy
Gauge number

36. What is true about a dry cell?
Energy
Volts
Common - not rechargable - gradually discharges when in storage(All of the above)
--^V^V^V^---

37. Where does the thumb point in both Left-Hand Rules?
A magnetic field
The direction the negative charge moves
Electromagnetic field
1/1000th of an inch

38. What is a type of mechanical transducer?
Secondary cell
Heat
Solenoid and Relay(both A and B)
Series circuit

39. What is the basic law of magnetic force?
How much potential difference can a material withstand before breaking down
The rate of doing work
Mutual induction
Unlike poles attract

40. What is a common measure of wire diameter?
Gauge number
Choke
Voltage
Purging

41. The generator is what method of creating potential energy?
A difference in potential energy
Use an effect to produce another effect
Electromagnetism
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. What is the type of cable composed of many fine wires?
Stranded
Current change in a coil creates a magnetic change
Electromagnetism
American wire gauge(AWG)

43. How is the heat production measured in a resistor?
Use an effect to produce another effect
75 Ohms
Potential difference - E*I - current times current change from point to point(all of the above)
From the negative battery terminal to the positive terminal

44. Identify the blueprint symbol for resistors.
Fixed - tapped - variable(all of the above)
--^V^V^V^---
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Relay

45. In most applications - what remains constant if the current remains constant and flows in one direction?
Volts
Ohms
Electromagnetic field
Does not move

46. What is the difference between AC and DC?
Gauge number
Relay
DC flows continuously in one direction and AC potential difference and current both change direction
Volts

47. What is a switch that operates by electricity?
Ohms
Potential difference
Relay
Fixed - tapped - variable(all of the above)

48. What does a third band of brown mean?
Series circuit
10
Current change in a coil creates a magnetic change
Opposition to movement of free electrons

49. What is a DC circuit characteristic?
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)
Current flows in one direction - potential differences across a load does not change(Both A and B)
Moving vehicles
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

50. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Alternating current
Wire splices
Circular and square mills(Both A and B)
Volts