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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 voltage?
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 difference in potential energy
Serial
Current flows in one direction - potential differences across a load does not change(Both A and B)

2. Which type of cell can be recharged?
Strength of the charge
Secondary cell
Electromagnetic field
Breakdown voltage

3. What is a conductor?
5%
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Parallel circuit
The direction the negative charge moves

4. When does a DC circuit oppose current flow?
A difference in potential energy
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Wire splices
Symbol

5. The thermocouple uses which method for creating potential energy?
Does not move
Heat
Resistance value can not be changed
Bare - covered - insulated - stranded - cable(All of the above)

6. How do you read resistor color codes?
Start with the band on the end and read to the center
Common - not rechargable - gradually discharges when in storage(All of the above)
Electromagnetism
5%

7. What is the purpose of a raceway?
Insulation resistance
Common - not rechargable - gradually discharges when in storage(All of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Resistance value can not be changed

8. What is the purpose of resistors in electrical circuits?
Alternating current
Produce heat - light - or limit current to control it(all of the above)
Bonding and grounding
Potential difference - E*I - current times current change from point to point(all of the above)

9. What is the purpose of capacitors in electrical circuits?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Volts
Stores electrical charge
The relationship of potential difference to current

10. What determines whether a spark can be produced?
By their covering
Strength of the charge
Current change in a coil creates a magnetic change
Voltmeter

11. What is the relationship between magnetism and electricity?
Area and spacing of capacitor - static current in the capacitor(both A and B)
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)
The relationship of potential difference to current
American wire gauge(AWG)

12. The dry cell is what method for creating potential energy?
Chemical action
Opposition to movement of free electrons
Area and spacing of capacitor - static current in the capacitor(both A and B)
Magnetic properties

13. What is an arrangement of materials that create a potential difference by chemistry?
By their covering
Volts
Cell
Alternating current

14. What does a first band of white mean?
Opposition to electrical current
Composition of the resistor
First digit is 9
12 volts

15. What is a way to classify wires and cables?
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)
Current flows in one direction - potential differences across a load does not change(Both A and B)
By their covering

16. What is the fundamental property of insulators?
A magnetic field
Series circuit
Fixed - tapped - variable(all of the above)
Insulation resistance and Dielectric strength(Both A and B)

17. Where does the thumb point in both Left-Hand Rules?
Relay
The direction the negative charge moves
Common - not rechargable - gradually discharges when in storage(All of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)

18. Identify the blueprint symbol for resistors.
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
--^V^V^V^---
Bare - covered - insulated - stranded - cable(All of the above)
Resistance value can not be changed

19. What does resistance produce?
Wire splices
Heat
Heat and current control(both a and c)
Two

20. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
Parallel circuit
Voltmeter
15 -000 ohms - 20%

21. What is resistance?
Serial
American wire gauge(AWG)
Opposition to movement of free electrons
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

22. Which of the following materials is NOT a good conductor?
Porcelain
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Parallel circuit
Cables

23. What is a property of inductors in electrical circuits?
How much potential difference can a material withstand before breaking down
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Opposes any change in the current flowing in a circuit
Moving vehicles

24. What does Ohm's Law represent?
Relationship between current and potential difference
1 watt
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)
From the negative battery terminal to the positive terminal

25. What is the measure of potential difference?
Relay
Volts
Potential difference
Use an effect to produce another effect

26. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
Serial
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Composition of the resistor

27. How do static charges distribute themselves?
Two
Stranded
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)

28. What is the type of cable composed of many fine wires?
Moving vehicles
Stranded
20%
1/1000th of an inch

29. What does a transformer transform?
Electromagnetism
75 Ohms
Chemical action
The relationship of potential difference to current

30. What type of circuit has two or more paths for current to follow?
Does not move
Parallel circuit
15 -000 ohms - 20%
Bonding and grounding

31. What instrument measures voltage?
Battery
Energy
Voltmeter
Opposition to movement of free electrons

32. When reading resistance color codes - what does the fourth band indicate?
Two
Potential difference
Tolerence
DC flows continuously in one direction and AC potential difference and current both change direction

33. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Serial
12 volts
1/1000th of an inch

34. How many kinds of poles do magnets have?
Potential difference
Two
50 Ohms
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

35. What information do the Left-Hand Rules provide?
Insulation resistance and Dielectric strength(Both A and B)
Volts
Current change in a coil creates a magnetic change
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

36. What type of circuit has one path of follow through a load?
Does not move
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)
Series circuit

37. What is the term for doing work at the rate of joule per second?
Composition of the resistor
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
1 watt
Potential difference

38. What is the name for electrical resistance of insulation?
75 Ohms
Insulation resistance
10%
Purging

39. What does a moving charge produce?
Two
Bare - covered - insulated - stranded - cable(All of the above)
Insulation resistance
A magnetic field

40. Identify the general blueprint symbol for inductors.
How much potential difference can a material withstand before breaking down
Symbol
Plastic - Rubber - Friction(all of the above)
Insulation resistance and Dielectric strength(Both A and B)

41. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Does not move
Ohms
Chemical action
20%

42. What is a DC circuit characteristic?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Tolerence
Cables
First digit is 9

43. What is a common form used in conductors?
Heat and current control(both a and c)
Moving vehicles
Strength of the charge
Cables

44. When reading resistance color codes - what does the first band indicate?
Electromagnetism
First digit
Heat and current control(both a and c)
A magnetic field

45. What is the difference between AC and DC?
Relationship between current and potential difference
First digit
DC flows continuously in one direction and AC potential difference and current both change direction
10

46. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
Insulation resistance and Dielectric strength(Both A and B)
Purging
The relationship of potential difference to current

47. What must be large enough to carry the largest current likely to occur?
Bare - covered - insulated - stranded - cable(All of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Grounding wire
Opposes any change in the current flowing in a circuit

48. What do transducers do in electrical terms?
Area and spacing of capacitor - static current in the capacitor(both A and B)
The relationship of potential difference to current
Relationship between current and potential difference
Use an effect to produce another effect

49. What is resistance in electrical terms?
Use an effect to produce another effect
Opposition to electrical current
15 -000 ohms - 20%
Alternating current

50. Which way is the current going in the circuit shown?(electron flow)
The rate of doing work
Insulation resistance
From the negative battery terminal to the positive terminal
Opposition to electrical current