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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. How do static charges distribute themselves?
High resistance
Produce heat - light - or limit current to control it(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Resistance value can not be changed

2. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
Unlike poles attract
Fixed - Electrolytic - Variable(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

3. Which way is the current going in the circuit shown?(electron flow)
Alternating current
Energy
From the negative battery terminal to the positive terminal
Mutual induction

4. How is the heat production measured in a resistor?
Plastic - Rubber - Friction(all of the above)
Series circuit
Potential difference - E*I - current times current change from point to point(all of the above)
Insulation resistance

5. 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
12 volts
Electromagnetic field
Circular and square mills(Both A and B)
Voltmeter

6. What does an object have if a magnetic field acts on it?
Two
Strength of the charge
Start with the band on the end and read to the center
Magnetic properties

7. What does a first band of white mean?
Voltmeter
First digit is 9
10%
Symbol

8. What is a wire classification?
Bare - covered - insulated - stranded - cable(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)
Wire splices
1/1000th of an inch

9. Where do the fingers point in both Left-Hand Rules?
A magnetic field
Alternating current
Solenoid and Relay(both A and B)
The direction of the magnetic field

10. What is the term for doing work at the rate of joule per second?
1 watt
1/1000th of an inch
Two
Gauge number

11. What is the fundamental property of insulators?
The rate of doing work
Circular and square mills(Both A and B)
American wire gauge(AWG)
Insulation resistance and Dielectric strength(Both A and B)

12. What is the measure of potential difference?
Fixed - Electrolytic - Variable(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)
Fixed - tapped - variable(all of the above)
Volts

13. What is a DC circuit characteristic?
Purging
Magnetic properties
12 volts
Current flows in one direction - potential differences across a load does not change(Both A and B)

14. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
Bonding and grounding
Symbol
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)

15. What is the unit of measurement of electrical current?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Amperes
Common - not rechargable - gradually discharges when in storage(All of the above)
Relationship between current and potential difference

16. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
10
High resistance
Two
Alternating current

17. What is the type of cable composed of many fine wires?
The rate of doing work
By their covering
Fixed - tapped - variable(all of the above)
Stranded

18. Which of the following materials is NOT a good conductor?
Energy
By their covering
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Porcelain

19. Which of the following is a type of resistor?
Stores electrical charge
Fixed - tapped - variable(all of the above)
Ability to store an electric charge
Electromagnetism

20. What type of circuit has one path of follow through a load?
Series circuit
Cell
A difference in potential energy
Resistance value can not be changed

21. What is capacitance in electrical terms?
--^V^V^V^---
Ability to store an electric charge
A magnetic field
The rate of doing work

22. Given R=E / I and the following information - plug in the data and solve the problem for resistance. 1.5 volt walkman battery - 0.02 amps of current
Cables
75 Ohms
Symbol
50 Ohms

23. What is a common cause of static electricity in a shop?
Electromagnetic field
Moving vehicles
Does not move
Electromagnetism

24. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Produce heat - light - or limit current to control it(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Electrical resistance against the flow of current

25. The thermocouple uses which method for creating potential energy?
Heat
Grounding wire
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
The rate of doing work

26. What makes electrons flow?
Volts
50 Ohms
Potential difference
Area and spacing of capacitor - static current in the capacitor(both A and B)

27. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Volts
Purging
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

28. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
Secondary cell
Area and spacing of capacitor - static current in the capacitor(both A and B)
1/1000th of an inch

29. What does resistance produce?
Series circuit
Tolerence
High resistance
Heat

30. What must be large enough to carry the largest current likely to occur?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Heat and current control(both a and c)
Choke
Grounding wire

31. How many kinds of poles do magnets have?
Voltmeter
Two
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Unlike poles attract

32. The generator is what method of creating potential energy?
Silver
Electromagnetism
Ohms
Cell

33. What is a characteristic of a fixed resistor?
Wire splices
Relationship between current and potential difference
Resistance value can not be changed
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

34. 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)
Porcelain
Parallel circuit
The direction of the magnetic field

35. Why is the transformer important to AC electricity?

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36. What is the relationship between magnetism and electricity?
Fixed - Electrolytic - Variable(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)
A magnetic field
Magnetic properties

37. What is the unit of measurement of potential difference?
DC current
Common - not rechargable - gradually discharges when in storage(All of the above)
Volts
Alternating current

38. What is resistance in electrical terms?
Relay
Chemical action
Choke
Opposition to electrical current

39. Identify the blueprint symbol for resistors.
Symbol
Strength of the charge
High resistance
--^V^V^V^---

40. How do you read resistor color codes?
Fixed - tapped - variable(all of the above)
Start with the band on the end and read to the center
Solenoid and Relay(both A and B)
Energy

41. What do junction boxes protect?
Parallel
Series circuit
Chemical action
Wire splices

42. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Voltage
Mutual induction
Purging
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

43. How is capacitance determined?
Resistance increases as the conductor length increases
Two
Potential difference
Area and spacing of capacitor - static current in the capacitor(both A and B)

44. What can permanently break down a capacitor?
10
A magnetic field
Breakdown voltage
Cables

45. What does Ohm's Law represent?
Use an effect to produce another effect
Unlike poles attract
Common - not rechargable - gradually discharges when in storage(All of the above)
Relationship between current and potential difference

46. Identify the general blueprint symbol for inductors.
Alternating current
The direction of the magnetic field
Symbol
Fixed - Electrolytic - Variable(all of the above)

47. What does static electricity do?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
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)
Series circuit
Does not move

48. What is the unit of measurement of resistance?
Breakdown voltage
Ohms
Porcelain
Produce heat - light - or limit current to control it(all of the above)

49. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
From the negative battery terminal to the positive terminal
10%
50 Ohms

50. What do transducers do in electrical terms?
Does not move
Resistance value can not be changed
Start with the band on the end and read to the center
Use an effect to produce another effect