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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.?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
American wire gauge(AWG)
Stranded
Current change in a coil creates a magnetic change

2. How many kinds of poles do magnets have?
Volts
Two
--^V^V^V^---
Wire splices

3. What does Ohm's Law represent?
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)
Current change in a coil creates a magnetic change
1 watt
Relationship between current and potential difference

4. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Alternating current
Heat and current control(both a and c)
Breakdown voltage

5. What is capacitance in electrical terms?
Ability to store an electric charge
American wire gauge(AWG)
Electromagnetism
Relationship between current and potential difference

6. What are the common units of measurement for round and square conductor cross - sections?
Current change in a coil creates a magnetic change
Cells can be connected together to make a battery
15 -000 ohms - 20%
Circular and square mills(Both A and B)

7. What is the relationship of conductor size and length to resistance?
Amperes
Resistance increases as the conductor length increases
Purging
The relationship of potential difference to current

8. What are the two generic methods to eliminate static electricity from metal objects?
Fixed - Electrolytic - Variable(all of the above)
Relay
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Bonding and grounding

9. What information do the Left-Hand Rules provide?
Cell
Energy
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
By their covering

10. What is the type of cable composed of many fine wires?
Stranded
A difference in potential energy
From the negative battery terminal to the positive terminal
10%

11. What is a conductor?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
12 volts
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Battery

12. What is a way to classify wires and cables?
How much potential difference can a material withstand before breaking down
By their covering
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Electrical resistance against the flow of current

13. How do static charges distribute themselves?
Amperes
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Symbol
The relationship of potential difference to current

14. What type of circuit has two or more paths for current to follow?
Grounding wire
Parallel circuit
15 -000 ohms - 20%
Insulation resistance and Dielectric strength(Both A and B)

15. What do transducers do in electrical terms?
Solenoid and Relay(both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Use an effect to produce another effect

16. 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
The rate of doing work
Strength of the charge
5%
12 volts

17. 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)
Relationship between current and potential difference
Purging
Opposes any change in the current flowing in a circuit

18. What is the unit of measurement of electrical current?
Cables
The relationship of potential difference to current
Amperes
Secondary cell

19. What does static electricity do?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Heat and current control(both a and c)
Does not move
Choke

20. What is the measure of potential difference?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Grounding wire
Volts
Cell

21. What is the purpose of capacitors in electrical circuits?
The direction of the magnetic field
Ohms
50 Ohms
Stores electrical charge

22. What is the difference between AC and DC?
20%
DC flows continuously in one direction and AC potential difference and current both change direction
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)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

23. Which of the following is a type of resistor?
20%
Common - not rechargable - gradually discharges when in storage(All of the above)
Fixed - tapped - variable(all of the above)
Does not move

24. The generator is what method of creating potential energy?
Stranded
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Electromagnetism
Potential difference

25. Which type of cell can be recharged?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Mutual induction
Secondary cell
First digit

26. What is needed for electric heating elements and the filaments of light bulbs?
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)
Chemical action
High resistance
Heat

27. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
Volts
Secondary cell
--^V^V^V^---

28. When does a DC circuit oppose current flow?
Symbol
Potential difference
Cell
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

29. What is a common form used in conductors?
Ability to store an electric charge
Cables
Two
Silver

30. 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
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
First digit is 9
75 Ohms
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

31. Why is the transformer important to AC electricity?

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32. Identify the general blueprint symbol for inductors.
A difference in potential energy
Fixed - tapped - variable(all of the above)
Symbol
A magnetic field

33. What do electrical charges need to cause a fire or explosion?
Serial
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Plastic - Rubber - Friction(all of the above)

34. Where do the fingers point in both Left-Hand Rules?
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)
Two
The direction of the magnetic field
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

35. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Ohms
Amperes
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

36. What does a first band of white mean?
First digit is 9
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Choke
By their covering

37. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
5%
Purging
The relationship of potential difference to current

38. What is voltage?
50 Ohms
15 -000 ohms - 20%
A difference in potential energy
Cells can be connected together to make a battery

39. What determines whether a spark can be produced?
Chemical action
Produce heat - light - or limit current to control it(all of the above)
Strength of the charge
Cables

40. What is an electromagnet?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Potential difference
Stores electrical charge
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

41. What is the purpose of resistors in electrical circuits?
The relationship of potential difference to current
Produce heat - light - or limit current to control it(all of the above)
Silver
Volts

42. Which material has the lowest resistance at ordinary temperatures?
Parallel
Silver
Choke
Wire splices

43. Which of the following materials is NOT a good conductor?
Composition of the resistor
Porcelain
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Voltage

44. To what measurement do the conductor mills refer?
1/1000th of an inch
Volts
Common - not rechargable - gradually discharges when in storage(All of the above)
Cells can be connected together to make a battery

45. What do we call the ability to do work?
The direction the negative charge moves
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Solenoid and Relay(both A and B)
Energy

46. What is induction?
10%
Start with the band on the end and read to the center
From the negative battery terminal to the positive terminal
Current change in a coil creates a magnetic change

47. What does an object have if a magnetic field acts on it?
Magnetic properties
Composition of the resistor
Amperes
Parallel

48. How is capacitance determined?
75 Ohms
Area and spacing of capacitor - static current in the capacitor(both A and B)
1/1000th of an inch
Use an effect to produce another effect

49. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Insulation resistance
Insulation resistance and Dielectric strength(Both A and B)
The direction the negative charge moves

50. What determines the resistance of a resistor?
Volts
Grounding wire
Two
Composition of the resistor