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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 wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
Cell
Amperes
Resistance value can not be changed

2. Which way is the current going in the circuit shown?(electron flow)
1/1000th of an inch
Symbol
Relationship between current and potential difference
From the negative battery terminal to the positive terminal

3. What is a type of capacitor?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
American wire gauge(AWG)
Grounding wire
Fixed - Electrolytic - Variable(all of the above)

4. What type of circuit has one path of follow through a load?
Resistance increases as the conductor length increases
By their covering
Series circuit
American wire gauge(AWG)

5. How is the heat production measured in a resistor?
10
Potential difference - E*I - current times current change from point to point(all of the above)
Use an effect to produce another effect
Purging

6. What is another name for an inductor?
Choke
Composition of the resistor
10
Plastic - Rubber - Friction(all of the above)

7. 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
Moving vehicles
How much potential difference can a material withstand before breaking down
Common - not rechargable - gradually discharges when in storage(All of the above)
75 Ohms

8. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
Mutual induction
Opposition to electrical current
First digit is 9

9. What is the name for electrical resistance of insulation?
Gauge number
Relationship between current and potential difference
1/1000th of an inch
Insulation resistance

10. The generator is what method of creating potential energy?
Electromagnetism
Start with the band on the end and read to the center
Porcelain
A magnetic field

11. When reading resistance color codes - what does the fourth band indicate?
Opposes any change in the current flowing in a circuit
10%
Secondary cell
Tolerence

12. What determines the resistance of a resistor?
The rate of doing work
First digit
Composition of the resistor
High resistance

13. What type of circuit has two or more paths for current to follow?
Wire splices
Parallel circuit
Heat
Voltmeter

14. What makes electrons flow?
Potential difference
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
5%
Fixed - tapped - variable(all of the above)

15. What does an object have if a magnetic field acts on it?
Magnetic properties
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Heat and current control(both a and c)
15 -000 ohms - 20%

16. What is power?
Does not move
The rate of doing work
A magnetic field
DC flows continuously in one direction and AC potential difference and current both change direction

17. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Secondary cell
A magnetic field
Use an effect to produce another effect
10%

18. Identify the general blueprint symbol for inductors.
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Volts
Symbol
Resistance value can not be changed

19. Identify the blueprint symbol for resistors.
Opposes any change in the current flowing in a circuit
--^V^V^V^---
Fixed - tapped - variable(all of the above)
50 Ohms

20. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Relay
Alternating current
Heat and current control(both a and c)

21. How do you read resistor color codes?
Solenoid and Relay(both A and B)
Start with the band on the end and read to the center
10
Magnetic properties

22. What do junction boxes protect?
Wire splices
Heat
Mutual induction
Stores electrical charge

23. How is capacitance determined?
Voltage
First digit is 9
The relationship of potential difference to current
Area and spacing of capacitor - static current in the capacitor(both A and B)

24. What is the unit of measurement of potential difference?
Serial
Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Volts

25. What is an electromagnet?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Two
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
The direction the negative charge moves

26. Where do the fingers point in both Left-Hand Rules?
Unlike poles attract
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)
Does not move

27. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Volts
From the negative battery terminal to the positive terminal
Mutual induction
--^V^V^V^---

28. What does static electricity do?
Fixed - tapped - variable(all of the above)
Heat
Opposition to electrical current
Does not move

29. Which of the following is a type of resistor?
American wire gauge(AWG)
Insulation resistance and Dielectric strength(Both A and B)
Serial
Fixed - tapped - variable(all of the above)

30. 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)
Energy
Symbol
Chemical action

31. How do static charges distribute themselves?
Opposes any change in the current flowing in a circuit
High resistance
Fixed - Electrolytic - Variable(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

32. What does a moving charge produce?
Breakdown voltage
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
A magnetic field
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

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

34. What is a switch that operates by electricity?
The rate of doing work
Two
Relay
Volts

35. What is a wire classification?
Cells can be connected together to make a battery
Bare - covered - insulated - stranded - cable(All of the above)
Volts
A magnetic field

36. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
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)
Plastic - Rubber - Friction(all of the above)
5%
Volts

37. What makes electrons flow?
Potential difference
Opposition to electrical current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Electrical resistance against the flow of current

38. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Bonding and grounding
The direction the negative charge moves
High resistance

39. Why is the transformer important to AC electricity?

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40. What do transducers do in electrical terms?
Use an effect to produce another effect
Parallel circuit
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)

41. To what measurement do the conductor mills refer?
1/1000th of an inch
Chemical action
Insulation resistance and Dielectric strength(Both A and B)
Two

42. What is the measure of potential difference?
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)
Volts
By their covering
50 Ohms

43. What is a common form used in conductors?
Energy
Porcelain
Bare - covered - insulated - stranded - cable(All of the above)
Cables

44. What is a characteristic of a fixed resistor?
High resistance
Resistance value can not be changed
Area and spacing of capacitor - static current in the capacitor(both A and B)
Choke

45. What cannot be transformed to higher or lower potential differences?
By their covering
DC current
75 Ohms
Heat

46. What is the term for doing work at the rate of joule per second?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
1 watt
Serial

47. How many kinds of poles do magnets have?
Two
15 -000 ohms - 20%
Area and spacing of capacitor - static current in the capacitor(both A and B)
The direction of the magnetic field

48. In most applications - what remains constant if the current remains constant and flows in one direction?
Produce heat - light - or limit current to control it(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Relay
Electromagnetic field

49. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
1 watt
Parallel
The relationship of potential difference to current
Volts

50. What instrument measures voltage?
Does not move
Relationship between current and potential difference
Voltmeter
Resistance increases as the conductor length increases