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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
Wire splices
The direction the negative charge moves
Heat

2. What is insulation resistance?
Mutual induction
50 Ohms
First digit
Electrical resistance against the flow of current

3. Which way is the current going in the circuit shown?(electron flow)
Porcelain
From the negative battery terminal to the positive terminal
Cell
The direction the negative charge moves

4. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
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)
Heat and current control(both a and c)
Solenoid and Relay(both A and B)

5. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Opposes any change in the current flowing in a circuit
Area and spacing of capacitor - static current in the capacitor(both A and B)
The direction the negative charge moves

6. 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
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
12 volts
Fixed - Electrolytic - Variable(all of the above)
Potential difference

7. How is capacitance determined?
Voltage
Area and spacing of capacitor - static current in the capacitor(both A and B)
Parallel circuit
Cell

8. What is the unit of measurement of resistance?
By their covering
Ohms
Symbol
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

9. What does an object have if a magnetic field acts on it?
Magnetic properties
Relay
Relationship between current and potential difference
Energy

10. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Voltmeter
Voltage
20%
Opposition to electrical current

11. What is resistance in electrical terms?
Bare - covered - insulated - stranded - cable(All of the above)
Opposition to electrical current
Solenoid and Relay(both A and B)
--^V^V^V^---

12. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Mutual induction
Choke

13. 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)
Electrical resistance against the flow of current
Voltage
Resistance value can not be changed

14. What does a transformer transform?
Amperes
The relationship of potential difference to current
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cell

15. What determines the resistance of a resistor?
Composition of the resistor
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cells can be connected together to make a battery
Moving vehicles

16. What does a moving charge produce?
10
A magnetic field
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
1/1000th of an inch

17. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Cells can be connected together to make a battery
American wire gauge(AWG)
Insulation resistance
50 Ohms

18. What do electrical charges need to cause a fire or explosion?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
Circular and square mills(Both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)

19. What is the unit of measurement of potential difference?
Volts
Plastic - Rubber - Friction(all of the above)
Opposition to electrical current
The relationship of potential difference to current

20. What must be large enough to carry the largest current likely to occur?
Does not move
Choke
Grounding wire
1/1000th of an inch

21. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Choke
Tolerence
--^V^V^V^---

22. What is a characteristic of a fixed resistor?
Potential difference
Parallel
Resistance value can not be changed
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

23. How many kinds of poles do magnets have?
Magnetic properties
50 Ohms
Relationship between current and potential difference
Two

24. What does a first band of white mean?
Heat
First digit is 9
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)

25. When reading resistance color codes - what does the first band indicate?
First digit
12 volts
Current change in a coil creates a magnetic change
By their covering

26. What is the relationship between magnetism and electricity?
Symbol
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)
Strength of the charge
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)

27. What is the purpose of resistors in electrical circuits?
Electromagnetic field
Opposition to electrical current
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Produce heat - light - or limit current to control it(all of the above)

28. What cannot be transformed to higher or lower potential differences?
Parallel
DC current
50 Ohms
Voltage

29. What is a characteristic of insulators?
Wire splices
Use an effect to produce another effect
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
10

30. What makes electrons flow?
DC flows continuously in one direction and AC potential difference and current both change direction
Potential difference
Silver
Serial

31. What does resistance produce?
Cables
Strength of the charge
Heat
Solenoid and Relay(both A and B)

32. What is induction?
DC current
Current change in a coil creates a magnetic change
Volts
Secondary cell

33. What is an electromagnet?
Opposition to movement of free electrons
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Plastic - Rubber - Friction(all of the above)
Tolerence

34. A resistor is color coded brown - green - orange. What is its resistance?
15 -000 ohms - 20%
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Alternating current
The rate of doing work

35. What is resistance?
Opposition to movement of free electrons
Silver
Ability to store an electric charge
First digit is 9

36. What is a switch that operates by electricity?
20%
Ohms
Relay
Voltage

37. To what measurement do the conductor mills refer?
Parallel circuit
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Cell
1/1000th of an inch

38. What is a wire classification?
Bare - covered - insulated - stranded - cable(All of the above)
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
Resistance value can not be changed

39. What is dielectric strength?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Opposes any change in the current flowing in a circuit
How much potential difference can a material withstand before breaking down
Fixed - tapped - variable(all of the above)

40. What is the term for two or more cells attached together?
Mutual induction
Voltage
Battery
15 -000 ohms - 20%

41. What is the term for doing work at the rate of joule per second?
Voltmeter
Choke
Tolerence
1 watt

42. What is the measure of potential difference?
Heat and current control(both a and c)
Relationship between current and potential difference
5%
Volts

43. What is a common cause of static electricity in a shop?
Moving vehicles
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)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

44. What instrument measures voltage?
Voltmeter
Volts
Opposition to movement of free electrons
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)

45. What is a common form used in conductors?
Cables
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Chemical action
Heat

46. Identify the general blueprint symbol for inductors.
High resistance
Symbol
Stranded
Bonding and grounding

47. What information do the Left-Hand Rules provide?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
10
A magnetic field
Electrical resistance against the flow of current

48. What is the purpose of capacitors in electrical circuits?
Plastic - Rubber - Friction(all of the above)
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)
Potential difference - E*I - current times current change from point to point(all of the above)
Stores electrical charge

49. What is capacitance in electrical terms?
Ability to store an electric charge
Volts
Two
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

50. What is the difference between AC and DC?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Start with the band on the end and read to the center
Wire splices
DC flows continuously in one direction and AC potential difference and current both change direction