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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 produced when an alternator rotates 360 electrical degrees through a magnetic field?
Alternating current
20%
Energy
From the negative battery terminal to the positive terminal

2. What is an arrangement of materials that create a potential difference by chemistry?
Magnetic properties
Breakdown voltage
Parallel
Cell

3. What is the purpose of a raceway?
Relay
Electrical resistance against the flow of current
75 Ohms
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

4. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
American wire gauge(AWG)
Parallel
Opposition to electrical current
Cells can be connected together to make a battery

5. What are the names of two of the six primary methods of producing a voltage?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
The rate of doing work
Ohms
Alternating current

6. What is the unit of measurement of resistance?
Tolerence
Ohms
Choke
Potential difference

7. What do we call the ability to do work?
Energy
Porcelain
Does not move
5%

8. What must be large enough to carry the largest current likely to occur?
Fixed - tapped - variable(all of the above)
Grounding wire
The direction of the magnetic field
A difference in potential energy

9. Which type of cell can be recharged?
1/1000th of an inch
Secondary cell
Potential difference
Unlike poles attract

10. What is a switch that operates by electricity?
Bare - covered - insulated - stranded - cable(All of the above)
Relay
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Parallel circuit

11. What is the measure of potential difference?
Electromagnetism
Volts
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Relay

12. Which way is the current going in the circuit shown?(electron flow)
The direction of the magnetic field
From the negative battery terminal to the positive terminal
Bare - covered - insulated - stranded - cable(All of the above)
50 Ohms

13. What does a transformer transform?
Bare - covered - insulated - stranded - cable(All of the above)
5%
Battery
The relationship of potential difference to current

14. What does a moving charge produce?
Circular and square mills(Both A and B)
Voltage
Symbol
A magnetic field

15. Which material has the lowest resistance at ordinary temperatures?
Silver
Electromagnetic field
Produce heat - light - or limit current to control it(all of the above)
A magnetic field

16. What is the difference between AC and DC?
1 watt
DC current
Cables
DC flows continuously in one direction and AC potential difference and current both change direction

17. What type of circuit has one path of follow through a load?
Insulation resistance
Series circuit
Ability to store an electric charge
Symbol

18. What types of protective tapes are used?
Does not move
Plastic - Rubber - Friction(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

19. The dry cell is what method for creating potential energy?
Chemical action
Opposition to movement of free electrons
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction

20. What determines whether a spark can be produced?
American wire gauge(AWG)
Strength of the charge
The relationship of potential difference to current
5%

21. What is dielectric strength?
How much potential difference can a material withstand before breaking down
Parallel circuit
Current flows in one direction - potential differences across a load does not change(Both A and B)
Secondary cell

22. What is a type of capacitor?
Wire splices
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
10
Fixed - Electrolytic - Variable(all of the above)

23. What is a type of mechanical transducer?
High resistance
Cables
Insulation resistance and Dielectric strength(Both A and B)
Solenoid and Relay(both A and B)

24. What cannot be transformed to higher or lower potential differences?
DC current
Solenoid and Relay(both A and B)
75 Ohms
Voltmeter

25. What is the term for two or more cells attached together?
A magnetic field
Battery
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

26. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
Current change in a coil creates a magnetic change
Opposition to electrical current
Alternating current

27. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Symbol
10
50 Ohms
DC flows continuously in one direction and AC potential difference and current both change direction

28. What is a DC circuit characteristic?
Tolerence
Current flows in one direction - potential differences across a load does not change(Both A and B)
The rate of doing work
Opposition to movement of free electrons

29. What is the use of the electromagnet?
Symbol
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Amperes
Opposition to electrical current

30. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Volts
Purging
DC current
Parallel

31. What wire measurement is commonly used in the U.S.?
Electrical resistance against the flow of current
Voltage
12 volts
American wire gauge(AWG)

32. What is voltage?
Bare - covered - insulated - stranded - cable(All of the above)
Potential difference
A difference in potential energy
Start with the band on the end and read to the center

33. Which of the following materials is NOT a good conductor?
Cells can be connected together to make a battery
Porcelain
Serial
Energy

34. What is a common form used in conductors?
Cables
Symbol
Cell
Area and spacing of capacitor - static current in the capacitor(both A and B)

35. What is the purpose of resistors in electrical circuits?
High resistance
Produce heat - light - or limit current to control it(all of the above)
Amperes
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

36. What does an object have if a magnetic field acts on it?
Common - not rechargable - gradually discharges when in storage(All of the above)
Unlike poles attract
Current change in a coil creates a magnetic change
Magnetic properties

37. What is a common cause of static electricity in a shop?
Moving vehicles
Heat and current control(both a and c)
--^V^V^V^---
Heat

38. Where does the thumb point in both Left-Hand Rules?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
The direction the negative charge moves
Secondary cell
10%

39. What type of circuit has two or more paths for current to follow?
Circular and square mills(Both A and B)
First digit
Parallel circuit
Unlike poles attract

40. What is the relationship between cells and batteries?
Amperes
Cells can be connected together to make a battery
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

41. What is the relationship between magnetism and electricity?
Composition of the resistor
1 watt
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)
Amperes

42. A resistor is color coded brown - green - orange. What is its resistance?
Use an effect to produce another effect
15 -000 ohms - 20%
Potential difference - E*I - current times current change from point to point(all of the above)
Does not move

43. What is the purpose of capacitors in electrical circuits?
50 Ohms
Stores electrical charge
Resistance increases as the conductor length increases
First digit is 9

44. What does static electricity do?
DC current
1/1000th of an inch
From the negative battery terminal to the positive terminal
Does not move

45. What does Ohm's Law represent?
Relationship between current and potential difference
Cables
Opposition to electrical current
The direction the negative charge moves

46. When reading resistance color codes - what does the fourth band indicate?
Ohms
First digit is 9
Resistance increases as the conductor length increases
Tolerence

47. How many kinds of poles do magnets have?
Ability to store an electric charge
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Two
Relationship between current and potential difference

48. What does a third band of brown mean?
Relay
75 Ohms
10
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

49. What is the unit of measurement of potential difference?
Volts
Stores electrical charge
75 Ohms
The direction of the magnetic field

50. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
The rate of doing work