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Basic Electricity

Instructions:

Answer 50 questions in 15 minutes.
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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 are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Electromagnetic field
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)
Parallel

2. Which type of cell can be recharged?
Secondary cell
Does not move
Choke
12 volts

3. The dry cell is what method for creating potential energy?
Relay
Fixed - Electrolytic - Variable(all of the above)
Chemical action
10

4. What is the relationship between magnetism and electricity?
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)
Heat
1 watt
Breakdown voltage

5. What does a first band of white mean?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Wire splices
Magnetic properties
First digit is 9

6. A resistor is color coded brown - green - orange. What is its resistance?
Alternating current
Serial
10%
15 -000 ohms - 20%

7. What is a common cause of static electricity in a shop?
Heat and current control(both a and c)
Moving vehicles
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

8. What type of circuit has one path of follow through a load?
Potential difference
Wire splices
Series circuit
Start with the band on the end and read to the center

9. What do transducers do in electrical terms?
Use an effect to produce another effect
High resistance
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
First digit is 9

10. When reading resistance color codes - what does the fourth band indicate?
Fixed - Electrolytic - Variable(all of the above)
Tolerence
Stranded
Composition of the resistor

11. What are the two generic methods to eliminate static electricity from metal objects?
High resistance
Opposes any change in the current flowing in a circuit
Bonding and grounding
Fixed - tapped - variable(all of the above)

12. What must be large enough to carry the largest current likely to occur?
By their covering
Grounding wire
The relationship of potential difference to current
Common - not rechargable - gradually discharges when in storage(All of the above)

13. What is the difference between AC and DC?
75 Ohms
The relationship of potential difference to current
DC flows continuously in one direction and AC potential difference and current both change direction
The rate of doing work

14. What is the fundamental property of insulators?
Porcelain
Insulation resistance and Dielectric strength(Both A and B)
Tolerence
Energy

15. What is a wire classification?
How much potential difference can a material withstand before breaking down
Volts
Bare - covered - insulated - stranded - cable(All of the above)
Ability to store an electric charge

16. The generator is what method of creating potential energy?
Resistance value can not be changed
Electromagnetism
Magnetic properties
Fixed - Electrolytic - Variable(all of the above)

17. What is the relationship between cells and batteries?
Porcelain
1 watt
Cells can be connected together to make a battery
1/1000th of an inch

18. What determines whether a spark can be produced?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Volts
Strength of the charge
High resistance

19. What is the term for two or more cells attached together?
Opposes any change in the current flowing in a circuit
Battery
Symbol
Unlike poles attract

20. What do junction boxes protect?
Wire splices
15 -000 ohms - 20%
A magnetic field
The direction of the magnetic field

21. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
DC current
Heat
Alternating current

22. What is a conductor?
Gauge number
Cables
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Circular and square mills(Both A and B)

23. When reading resistance color codes - what does the first band indicate?
First digit
Volts
15 -000 ohms - 20%
Bare - covered - insulated - stranded - cable(All of the above)

24. What is the basic law of magnetic force?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Unlike poles attract
Solenoid and Relay(both A and B)

25. Which of the following materials is NOT a good conductor?
Porcelain
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Wire splices

26. What does Ohm's Law represent?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Relationship between current and potential difference
Solenoid and Relay(both A and B)
Composition of the resistor

27. Which way is the current going in the circuit shown?(electron flow)
DC flows continuously in one direction and AC potential difference and current both change direction
Voltmeter
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
From the negative battery terminal to the positive terminal

28. What is induction?
Resistance value can not be changed
Current change in a coil creates a magnetic change
5%
Moving vehicles

29. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
--^V^V^V^---
Use an effect to produce another effect
10%
Two

30. What is a type of capacitor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Fixed - Electrolytic - Variable(all of the above)
A magnetic field
Solenoid and Relay(both A and B)

31. What is voltage?
Common - not rechargable - gradually discharges when in storage(All of the above)
How much potential difference can a material withstand before breaking down
1 watt
A difference in potential energy

32. 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)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
The rate of doing work
First digit is 9

33. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Use an effect to produce another effect
Fixed - Electrolytic - Variable(all of the above)
Voltage
American wire gauge(AWG)

34. What is the name for electrical resistance of insulation?
Amperes
Insulation resistance
Parallel circuit
50 Ohms

35. What does resistance produce?
Heat
Opposition to electrical current
A magnetic field
Cables

36. 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
Symbol
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
50 Ohms
75 Ohms

37. Identify the general blueprint symbol for inductors.
Opposes any change in the current flowing in a circuit
By their covering
Insulation resistance and Dielectric strength(Both A and B)
Symbol

38. What is the unit of measurement of resistance?
Start with the band on the end and read to the center
Plastic - Rubber - Friction(all of the above)
Ohms
American wire gauge(AWG)

39. What does a transformer transform?
The relationship of potential difference to current
Gauge number
Cables
Strength of the charge

40. What is resistance?
Opposition to movement of free electrons
Composition of the resistor
Chemical action
DC flows continuously in one direction and AC potential difference and current both change direction

41. What is an electromagnet?
Current change in a coil creates a magnetic change
Purging
Common - not rechargable - gradually discharges when in storage(All of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

42. Where does the thumb point in both Left-Hand Rules?
Opposes any change in the current flowing in a circuit
Amperes
The direction the negative charge moves
Insulation resistance and Dielectric strength(Both A and B)

43. What does static electricity do?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
American wire gauge(AWG)
Does not move

44. What is the measure of potential difference?
Volts
Start with the band on the end and read to the center
5%
Voltmeter

45. In most applications - what remains constant if the current remains constant and flows in one direction?
American wire gauge(AWG)
Chemical action
75 Ohms
Electromagnetic field

46. What is the unit of measurement of electrical current?
Heat
Amperes
Breakdown voltage
--^V^V^V^---

47. What information do the Left-Hand Rules provide?
Resistance value can not be changed
The direction the negative charge moves
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

48. Why is the transformer important to AC electricity?

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49. To what measurement do the conductor mills refer?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Ohms
1/1000th of an inch
Serial

50. What makes electrons flow?
Potential difference
DC flows continuously in one direction and AC potential difference and current both change direction
20%
Relay

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Basic Electricity

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