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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 common measure of wire diameter?
Opposition to electrical current
Gauge number
The direction the negative charge moves
Start with the band on the end and read to the center

2. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
Secondary cell
Fixed - tapped - variable(all of the above)
Amperes

3. What is the basic law of magnetic force?
Serial
A magnetic field
Does not move
Unlike poles attract

4. What is the type of cable composed of many fine wires?
Ability to store an electric charge
Stranded
Volts
First digit

5. What is a type of mechanical transducer?
Volts
Solenoid and Relay(both A and B)
The direction of the magnetic field
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)

6. How is the heat production measured in a resistor?
Potential difference - E*I - current times current change from point to point(all of the above)
Relay
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)
1/1000th of an inch

7. What is a characteristic of insulators?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
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)
Insulation resistance and Dielectric strength(Both A and B)

8. What information do the Left-Hand Rules provide?
Potential difference
Current flows in one direction - potential differences across a load does not change(Both A and B)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Circular and square mills(Both A and B)

9. What is dielectric strength?
First digit is 9
How much potential difference can a material withstand before breaking down
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)
Start with the band on the end and read to the center

10. What types of protective tapes are used?
50 Ohms
High resistance
Plastic - Rubber - Friction(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)

11. Which type of cell can be recharged?
Bonding and grounding
Alternating current
Heat and current control(both a and c)
Secondary cell

12. What is a common form used in conductors?
Choke
Gauge number
Cables
Insulation resistance and Dielectric strength(Both A and B)

13. What is the difference between AC and DC?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
Relay

14. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
50 Ohms
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Moving vehicles
Voltage

15. What is the unit of measurement of electrical current?
A magnetic field
Bare - covered - insulated - stranded - cable(All of the above)
Solenoid and Relay(both A and B)
Amperes

16. What is the fundamental property of insulators?
Stores electrical charge
Insulation resistance and Dielectric strength(Both A and B)
Resistance increases as the conductor length increases
High resistance

17. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
DC flows continuously in one direction and AC potential difference and current both change direction
Heat
Serial
How much potential difference can a material withstand before breaking down

18. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Silver
Plastic - Rubber - Friction(all of the above)
Ability to store an electric charge

19. What is the term for doing work at the rate of joule per second?
Electromagnetism
Magnetic properties
Heat and current control(both a and c)
1 watt

20. What is an electromagnet?
Area and spacing of capacitor - static current in the capacitor(both A and B)
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
Porcelain

21. What cannot be transformed to higher or lower potential differences?
Gauge number
Relationship between current and potential difference
DC current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

22. What does a moving charge produce?
Breakdown voltage
Strength of the charge
A magnetic field
Potential difference - E*I - current times current change from point to point(all of the above)

23. What is a DC circuit characteristic?
Opposition to movement of free electrons
Circular and square mills(Both A and B)
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)

24. Which way is the current going in the circuit shown?(electron flow)
Volts
Symbol
American wire gauge(AWG)
From the negative battery terminal to the positive terminal

25. To what measurement do the conductor mills refer?
The relationship of potential difference to current
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)
Symbol
1/1000th of an inch

26. What do junction boxes protect?
Electrical resistance against the flow of current
Potential difference
Ability to store an electric charge
Wire splices

27. Identify the blueprint symbol for resistors.
Relationship between current and potential difference
Gauge number
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
--^V^V^V^---

28. What is power?
Relationship between current and potential difference
Ability to store an electric charge
Voltmeter
The rate of doing work

29. Why is the transformer important to AC electricity?

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30. What is needed for electric heating elements and the filaments of light bulbs?
Heat and current control(both a and c)
High resistance
Ohms
By their covering

31. What can permanently break down a capacitor?
Breakdown voltage
Bonding and grounding
Porcelain
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)

32. Identify the general blueprint symbol for inductors.
Potential difference
Electromagnetism
Voltage
Symbol

33. When reading resistance color codes - what does the fourth band indicate?
Insulation resistance and Dielectric strength(Both A and B)
10
Tolerence
Area and spacing of capacitor - static current in the capacitor(both A and B)

34. What is the measure of potential difference?
Breakdown voltage
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Volts
75 Ohms

35. Which material has the lowest resistance at ordinary temperatures?
Resistance increases as the conductor length increases
10%
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Silver

36. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
By their covering
Stranded
Symbol

37. What is the term for two or more cells attached together?
Solenoid and Relay(both A and B)
Battery
Resistance increases as the conductor length increases
Porcelain

38. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Volts
Two
50 Ohms
Mutual induction

39. What is the unit of measurement of potential difference?
Potential difference
Volts
15 -000 ohms - 20%
A difference in potential energy

40. What is the unit of measurement of resistance?
Fixed - tapped - variable(all of the above)
Ohms
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)
Parallel circuit

41. What does a transformer transform?
Electromagnetism
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
The relationship of potential difference to current
Relationship between current and potential difference

42. What are the names of two of the six primary methods of producing a voltage?
20%
Ability to store an electric charge
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Purging

43. What is a common cause of static electricity in a shop?
Bonding and grounding
Moving vehicles
Voltmeter
Start with the band on the end and read to the center

44. What is induction?
From the negative battery terminal to the positive terminal
Stores electrical charge
Current change in a coil creates a magnetic change
Chemical action

45. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
1/1000th of an inch
Fixed - Electrolytic - Variable(all of the above)
Stranded

46. What do transducers do in electrical terms?
Parallel circuit
Grounding wire
Use an effect to produce another effect
10%

47. What determines whether a spark can be produced?
Cells can be connected together to make a battery
Strength of the charge
Cables
The relationship of potential difference to current

48. What is true about a dry cell?
Secondary cell
Bare - covered - insulated - stranded - cable(All of the above)
Voltage
Common - not rechargable - gradually discharges when in storage(All of the above)

49. What is the purpose of resistors in electrical circuits?
Insulation resistance
From the negative battery terminal to the positive terminal
Produce heat - light - or limit current to control it(all of the above)
Electromagnetic field

50. How many kinds of poles do magnets have?
Potential difference
Two
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Purging