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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 capacitance in electrical terms?
12 volts
Produce heat - light - or limit current to control it(all of the above)
Ability to store an electric charge
Fixed - Electrolytic - Variable(all of the above)

2. Identify the general blueprint symbol for inductors.
Volts
Symbol
Opposition to movement of free electrons
The direction the negative charge moves

3. What is a way to classify wires and cables?
Cells can be connected together to make a battery
By their covering
Use an effect to produce another effect
10%

4. What is voltage?
Opposition to electrical current
Gauge number
A difference in potential energy
5%

5. Identify the blueprint symbol for resistors.
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)
Plastic - Rubber - Friction(all of the above)
--^V^V^V^---
DC flows continuously in one direction and AC potential difference and current both change direction

6. What is the basic law of magnetic force?
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)
Grounding wire
Potential difference
Unlike poles attract

7. Which way is the current going in the circuit shown?(electron flow)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Parallel circuit
From the negative battery terminal to the positive terminal
75 Ohms

8. What is induction?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Current change in a coil creates a magnetic change
Potential difference - E*I - current times current change from point to point(all of the above)
American wire gauge(AWG)

9. What do we call the ability to do work?
Electromagnetic field
50 Ohms
From the negative battery terminal to the positive terminal
Energy

10. What does an object have if a magnetic field acts on it?
Electrical resistance against the flow of current
Relationship between current and potential difference
Magnetic properties
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)

11. What is the term for two or more cells attached together?
Secondary cell
Battery
Potential difference
Amperes

12. Which material has the lowest resistance at ordinary temperatures?
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)
Bare - covered - insulated - stranded - cable(All of the above)
Silver
Plastic - Rubber - Friction(all of the above)

13. Why is the transformer important to AC electricity?

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14. What is a switch that operates by electricity?
DC current
Strength of the charge
Relay
A magnetic field

15. What can permanently break down a capacitor?
Stranded
Stores electrical charge
50 Ohms
Breakdown voltage

16. Which type of cell can be recharged?
1/1000th of an inch
Secondary cell
Symbol
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

17. What is the term for doing work at the rate of joule per second?
12 volts
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Stores electrical charge
1 watt

18. When reading resistance color codes - what does the first band indicate?
Opposition to movement of free electrons
Strength of the charge
Heat
First digit

19. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
Volts
20%
Potential difference - E*I - current times current change from point to point(all of the above)

20. To what measurement do the conductor mills refer?
1/1000th of an inch
First digit
Relationship between current and potential difference
The rate of doing work

21. What are the names of two of the six primary methods of producing a voltage?
High resistance
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
From the negative battery terminal to the positive terminal
Use an effect to produce another effect

22. How many kinds of poles do magnets have?
Grounding wire
Two
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)
Use an effect to produce another effect

23. What is the unit of measurement of potential difference?
Potential difference - E*I - current times current change from point to point(all of the above)
Volts
Heat
Area and spacing of capacitor - static current in the capacitor(both A and B)

24. What does a first band of white mean?
Does not move
First digit is 9
Mutual induction
Stranded

25. What is the fundamental property of insulators?
Relationship between current and potential difference
Electrical resistance against the flow of current
Insulation resistance and Dielectric strength(Both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)

26. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
Stores electrical charge
Opposes any change in the current flowing in a circuit
Battery

27. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
Opposition to movement of free electrons
Insulation resistance and Dielectric strength(Both A and B)
20%

28. The thermocouple uses which method for creating potential energy?
Secondary cell
High resistance
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Heat

29. What types of protective tapes are used?
Energy
Resistance increases as the conductor length increases
Plastic - Rubber - Friction(all of the above)
Chemical action

30. What is the type of cable composed of many fine wires?
Opposes any change in the current flowing in a circuit
Bare - covered - insulated - stranded - cable(All of the above)
Moving vehicles
Stranded

31. What determines whether a spark can be produced?
--^V^V^V^---
Strength of the charge
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Circular and square mills(Both A and B)

32. What is dielectric strength?
How much potential difference can a material withstand before breaking down
Bare - covered - insulated - stranded - cable(All of the above)
Current change in a coil creates a magnetic change
5%

33. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Chemical action
Electromagnetic field

34. What is a type of capacitor?
Wire splices
First digit
Fixed - Electrolytic - Variable(all of the above)
--^V^V^V^---

35. What is another name for an inductor?
Choke
Wire splices
Does not move
Purging

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

37. What is a characteristic of a fixed resistor?
Resistance value can not be changed
Bare - covered - insulated - stranded - cable(All of the above)
Insulation resistance
Two

38. What is a conductor?
Stores electrical charge
Stranded
Choke
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

39. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Amperes
Common - not rechargable - gradually discharges when in storage(All of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

40. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Potential difference - E*I - current times current change from point to point(all of the above)
Amperes
Relay

41. Where does the thumb point in both Left-Hand Rules?
Common - not rechargable - gradually discharges when in storage(All of the above)
The direction the negative charge moves
Stranded
Produce heat - light - or limit current to control it(all of the above)

42. Where do the fingers point in both Left-Hand Rules?
Energy
Use an effect to produce another effect
American wire gauge(AWG)
The direction of the magnetic field

43. What does a transformer transform?
Bonding and grounding
5%
Stores electrical charge
The relationship of potential difference to current

44. What instrument measures voltage?
Wire splices
Voltmeter
75 Ohms
--^V^V^V^---

45. How is the heat production measured in a resistor?
A difference in potential energy
Potential difference - E*I - current times current change from point to point(all of the above)
A magnetic field
Common - not rechargable - gradually discharges when in storage(All of the above)

46. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
Electromagnetic field
12 volts
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

47. What is resistance in electrical terms?
Solenoid and Relay(both A and B)
Circular and square mills(Both A and B)
Ohms
Opposition to electrical current

48. What is the relationship of conductor size and length to resistance?
Amperes
Resistance increases as the conductor length increases
Ability to store an electric charge
How much potential difference can a material withstand before breaking down

49. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Resistance value can not be changed
Electromagnetism
Heat

50. What is the relationship between magnetism and electricity?
Electromagnetism
Choke
Cables
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)