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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 cause of static electricity in a shop?
Alternating current
Cell
Moving vehicles
Stranded

2. The dry cell is what method for creating potential energy?
Chemical action
Cells can be connected together to make a battery
Gauge number
Tolerence

3. 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
Gauge number
Wire splices
20%
75 Ohms

4. What is the relationship between magnetism and electricity?
--^V^V^V^---
Symbol
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)
Silver

5. What is the difference between AC and DC?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
By their covering
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
DC flows continuously in one direction and AC potential difference and current both change direction

6. How many kinds of poles do magnets have?
75 Ohms
Bonding and grounding
Two
Current flows in one direction - potential differences across a load does not change(Both A and B)

7. Which of the following materials is NOT a good conductor?
Voltmeter
DC current
Cables
Porcelain

8. What are the common units of measurement for round and square conductor cross - sections?
Purging
Circular and square mills(Both A and B)
Serial
Unlike poles attract

9. What is a common measure of wire diameter?
Current flows in one direction - potential differences across a load does not change(Both A and B)
The direction of the magnetic field
Gauge number
Purging

10. What determines whether a spark can be produced?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Strength of the charge
Resistance value can not be changed
Purging

11. What is a rigid metal conduit?
Amperes
Unlike poles attract
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

12. What are the two generic methods to eliminate static electricity from metal objects?
Resistance value can not be changed
Wire splices
Bonding and grounding
Common - not rechargable - gradually discharges when in storage(All of the above)

13. What is voltage?
Potential difference
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
A difference in potential energy

14. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Solenoid and Relay(both A and B)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Electromagnetism
50 Ohms

15. The thermocouple uses which method for creating potential energy?
Parallel circuit
Resistance increases as the conductor length increases
15 -000 ohms - 20%
Heat

16. What is the use of the electromagnet?
Does not move
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Strength of the charge

17. What is resistance?
A difference in potential energy
Common - not rechargable - gradually discharges when in storage(All of the above)
Opposition to movement of free electrons
Current flows in one direction - potential differences across a load does not change(Both A and B)

18. What is the relationship between cells and batteries?
1/1000th of an inch
Electromagnetism
75 Ohms
Cells can be connected together to make a battery

19. What is capacitance in electrical terms?
Ability to store an electric charge
Potential difference
The direction the negative charge moves
Parallel circuit

20. What is the type of cable composed of many fine wires?
The relationship of potential difference to current
Electromagnetic field
Parallel
Stranded

21. To what measurement do the conductor mills refer?
Secondary cell
12 volts
1/1000th of an inch
Current change in a coil creates a magnetic change

22. What type of circuit has two or more paths for current to follow?
Does not move
Parallel circuit
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Wire splices

23. When does a DC circuit oppose current flow?
Choke
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Fixed - Electrolytic - Variable(all of the above)

24. What makes electrons flow?
Potential difference
Strength of the charge
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
DC current

25. What makes electrons flow?
Cells can be connected together to make a battery
Common - not rechargable - gradually discharges when in storage(All of the above)
Ability to store an electric charge
Potential difference

26. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
Ability to store an electric charge
American wire gauge(AWG)
Bare - covered - insulated - stranded - cable(All of the above)

27. What is a property of inductors in electrical circuits?
Breakdown voltage
A magnetic field
Opposes any change in the current flowing in a circuit
How much potential difference can a material withstand before breaking down

28. What does resistance produce?
Heat
12 volts
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)
Insulation resistance and Dielectric strength(Both A and B)

29. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Insulation resistance and Dielectric strength(Both A and B)
Serial
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Chemical action

30. What is the unit of measurement of electrical current?
Relationship between current and potential difference
Series circuit
Cells can be connected together to make a battery
Amperes

31. What is the unit of measurement of resistance?
Current change in a coil creates a magnetic change
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
A difference in potential energy
Ohms

32. When reading resistance color codes - what does the first band indicate?
First digit
The direction the negative charge moves
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

33. What are the names of two of the six primary methods of producing a voltage?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
12 volts
Chemical action

34. What is a type of capacitor?
Fixed - Electrolytic - Variable(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)
Heat
Choke

35. What results when current is run through a material with high resistance?
Symbol
Mutual induction
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Heat and current control(both a and c)

36. What does a moving charge produce?
From the negative battery terminal to the positive terminal
Strength of the charge
A magnetic field
Fixed - Electrolytic - Variable(all of the above)

37. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Stores electrical charge
Produce heat - light - or limit current to control it(all of the above)
Serial
10%

38. What is the term for doing work at the rate of joule per second?
15 -000 ohms - 20%
1 watt
Wire splices
Ability to store an electric charge

39. What is the name for electrical resistance of insulation?
Ohms
Cell
20%
Insulation resistance

40. What does a transformer transform?
The relationship of potential difference to current
Voltmeter
Energy
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

41. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
First digit is 9
Voltage
Parallel circuit
Electromagnetic field

42. How is the heat production measured in a resistor?
Potential difference - E*I - current times current change from point to point(all of the above)
Parallel
Fixed - Electrolytic - Variable(all of the above)
--^V^V^V^---

43. Which type of cell can be recharged?
Secondary cell
Plastic - Rubber - Friction(all of the above)
A difference in potential energy
Cell

44. What is a conductor?
DC flows continuously in one direction and AC potential difference and current both change direction
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Energy
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

45. What does static electricity do?
Does not move
Electrical resistance against the flow of current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Battery

46. What is a characteristic of insulators?
Mutual induction
Energy
A magnetic field
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

47. Why is the transformer important to AC electricity?

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48. What is insulation resistance?
Electrical resistance against the flow of current
Electromagnetic field
American wire gauge(AWG)
DC current

49. What does an object have if a magnetic field acts on it?
15 -000 ohms - 20%
Wire splices
Magnetic properties
Symbol

50. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
Heat
Circular and square mills(Both A and B)
Cells can be connected together to make a battery