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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 form used in conductors?
Electromagnetic field
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Cables
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

2. What is the purpose of capacitors in electrical circuits?
Composition of the resistor
Stores electrical charge
Heat
Start with the band on the end and read to the center

3. What is the unit of measurement of resistance?
Resistance value can not be changed
Ohms
Volts
Battery

4. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Stranded
Two
First digit

5. The thermocouple uses which method for creating potential energy?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Heat
By their covering
Fixed - Electrolytic - Variable(all of the above)

6. What is a common measure of wire diameter?
--^V^V^V^---
Gauge number
The relationship of potential difference to current
DC current

7. How many kinds of poles do magnets have?
Moving vehicles
By their covering
Two
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

8. What is an arrangement of materials that create a potential difference by chemistry?
Relay
Cell
Potential difference
First digit is 9

9. What does Ohm's Law represent?
How much potential difference can a material withstand before breaking down
Serial
Relationship between current and potential difference
Ability to store an electric charge

10. How do you read resistor color codes?
Use an effect to produce another effect
The direction of the magnetic field
Wire splices
Start with the band on the end and read to the center

11. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
DC current
Serial
Energy
Voltmeter

12. What is the unit of measurement of potential difference?
Potential difference
Relay
Volts
Insulation resistance and Dielectric strength(Both A and B)

13. What is the measure of potential difference?
Volts
From the negative battery terminal to the positive terminal
--^V^V^V^---
Stores electrical charge

14. Which way is the current going in the circuit shown?(electron flow)
Voltmeter
The direction the negative charge moves
From the negative battery terminal to the positive terminal
Breakdown voltage

15. A resistor is color coded brown - green - orange. What is its resistance?
A magnetic field
50 Ohms
15 -000 ohms - 20%
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

16. What information do the Left-Hand Rules provide?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Alternating current
Bonding and grounding
The rate of doing work

17. What is needed for electric heating elements and the filaments of light bulbs?
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)
High resistance
Electromagnetic field
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

18. The dry cell is what method for creating potential energy?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Chemical action
Two
Electromagnetic field

19. What does static electricity do?
Volts
Does not move
Voltmeter
Use an effect to produce another effect

20. What is the term for two or more cells attached together?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Battery
Fixed - Electrolytic - Variable(all of the above)
Heat

21. What do junction boxes protect?
Produce heat - light - or limit current to control it(all of the above)
Wire splices
Current flows in one direction - potential differences across a load does not change(Both A and B)
A difference in potential energy

22. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
1/1000th of an inch
Resistance value can not be changed
Relay

23. What is a DC circuit characteristic?
From the negative battery terminal to the positive terminal
Strength of the charge
Current flows in one direction - potential differences across a load does not change(Both A and B)
Battery

24. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
1 watt
Silver
Fixed - Electrolytic - Variable(all of the above)
Alternating current

25. Which material has the lowest resistance at ordinary temperatures?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Silver
Unlike poles attract
Insulation resistance and Dielectric strength(Both A and B)

26. What is a type of mechanical transducer?
Porcelain
Heat
Solenoid and Relay(both A and B)
Symbol

27. What does a first band of white mean?
Cells can be connected together to make a battery
Amperes
First digit is 9
50 Ohms

28. What is voltage?
Alternating current
Breakdown voltage
A difference in potential energy
The direction the negative charge moves

29. What is the type of cable composed of many fine wires?
Stranded
12 volts
Parallel
1 watt

30. When reading resistance color codes - what does the first band indicate?
Purging
American wire gauge(AWG)
First digit
Produce heat - light - or limit current to control it(all of the above)

31. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
Tolerence
Symbol
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

32. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Heat and current control(both a and c)
Parallel
Magnetic properties
Opposes any change in the current flowing in a circuit

33. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Battery
Magnetic properties
5%
Fixed - tapped - variable(all of the above)

34. What makes electrons flow?
1/1000th of an inch
Potential difference
A magnetic field
Symbol

35. What is a characteristic of a fixed resistor?
Magnetic properties
Choke
Two
Resistance value can not be changed

36. What is insulation resistance?
10%
Opposes any change in the current flowing in a circuit
Electrical resistance against the flow of current
Parallel

37. Which of the following materials is NOT a good conductor?
Porcelain
20%
Opposition to electrical current
Resistance value can not be changed

38. What is the relationship between cells and batteries?
The direction of the magnetic field
Two
Cells can be connected together to make a battery
Serial

39. How do static charges distribute themselves?
Current change in a coil creates a magnetic change
Series circuit
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)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

40. 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)
Common - not rechargable - gradually discharges when in storage(All of the above)
Electrical resistance against the flow of current
Breakdown voltage

41. What is the purpose of a raceway?
Mutual induction
Start with the band on the end and read to the center
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Fixed - Electrolytic - Variable(all of the above)

42. What is the use of the electromagnet?
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)
Battery
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Plastic - Rubber - Friction(all of the above)

43. What are the two generic methods to eliminate static electricity from metal objects?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
The relationship of potential difference to current
Bonding and grounding
Breakdown voltage

44. What is the basic law of magnetic force?
Battery
The relationship of potential difference to current
Unlike poles attract
Heat and current control(both a and c)

45. What does a third band of brown mean?
10
Energy
Resistance increases as the conductor length increases
Heat

46. What does an object have if a magnetic field acts on it?
Magnetic properties
Amperes
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Mutual induction

47. What is a property of inductors in electrical circuits?
Heat
Relationship between current and potential difference
Opposes any change in the current flowing in a circuit
Insulation resistance

48. What instrument measures voltage?
Electromagnetic field
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Voltmeter

49. What are the common units of measurement for round and square conductor cross - sections?
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)
DC current
Porcelain

50. What type of circuit has two or more paths for current to follow?
Grounding wire
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Parallel circuit
Serial