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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 type of circuit has two or more paths for current to follow?
Use an effect to produce another effect
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Fixed - tapped - variable(all of the above)
Parallel circuit

2. What is another name for an inductor?
DC current
Choke
10%
American wire gauge(AWG)

3. What is a common measure of wire diameter?
Volts
Gauge number
Cells can be connected together to make a battery
Produce heat - light - or limit current to control it(all of the above)

4. What is the term for doing work at the rate of joule per second?
Stranded
1 watt
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Grounding wire

5. Which type of cell can be recharged?
Use an effect to produce another effect
Electromagnetic field
Secondary cell
Two

6. What instrument measures voltage?
Potential difference - E*I - current times current change from point to point(all of the above)
Voltmeter
How much potential difference can a material withstand before breaking down
Opposition to movement of free electrons

7. What is needed for electric heating elements and the filaments of light bulbs?
Cables
Common - not rechargable - gradually discharges when in storage(All of the above)
Electromagnetic field
High resistance

8. What is the basic law of magnetic force?
Unlike poles attract
Opposes any change in the current flowing in a circuit
Potential difference - E*I - current times current change from point to point(all of the above)
Cell

9. Identify the blueprint symbol for resistors.
--^V^V^V^---
Moving vehicles
Secondary cell
Grounding wire

10. What is a conductor?
Resistance increases as the conductor length increases
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Tolerence
Opposition to electrical current

11. What is true about a dry cell?
Common - not rechargable - gradually discharges when in storage(All of the above)
50 Ohms
Symbol
Purging

12. What is a common form used in conductors?
Silver
Grounding wire
Gauge number
Cables

13. 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
Voltmeter
Bare - covered - insulated - stranded - cable(All of the above)
12 volts
Purging

14. What makes electrons flow?
The relationship of potential difference to current
Potential difference
10%
Current flows in one direction - potential differences across a load does not change(Both A and B)

15. How is capacitance determined?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Moving vehicles
Heat
Area and spacing of capacitor - static current in the capacitor(both A and B)

16. What is a common cause of static electricity in a shop?
Gauge number
Moving vehicles
By their covering
Parallel

17. What is a characteristic of a fixed resistor?
Resistance value can not be changed
Breakdown voltage
Unlike poles attract
Alternating current

18. What is the fundamental property of insulators?
Opposition to electrical current
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Opposes any change in the current flowing in a circuit
Insulation resistance and Dielectric strength(Both A and B)

19. Which of the following materials is NOT a good conductor?
Bonding and grounding
75 Ohms
Cell
Porcelain

20. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
10
Purging
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Electromagnetism

21. What is an electromagnet?
Insulation resistance and Dielectric strength(Both A and B)
Opposition to electrical current
Purging
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

22. What is the relationship between magnetism and electricity?
Relay
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)
Parallel
Heat and current control(both a and c)

23. Which material has the lowest resistance at ordinary temperatures?
10%
Silver
The direction the negative charge moves
DC current

24. What is dielectric strength?
Series circuit
How much potential difference can a material withstand before breaking down
The rate of doing work
Stranded

25. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
75 Ohms
Symbol
Solenoid and Relay(both A and B)
Mutual induction

26. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Electrical resistance against the flow of current
Battery
50 Ohms
10

27. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Grounding wire
Start with the band on the end and read to the center
The direction of the magnetic field
10%

28. What are the common units of measurement for round and square conductor cross - sections?
Tolerence
Insulation resistance
Potential difference
Circular and square mills(Both A and B)

29. What is the unit of measurement of resistance?
Electrical resistance against the flow of current
High resistance
A magnetic field
Ohms

30. What is a characteristic of insulators?
Unlike poles attract
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Heat and current control(both a and c)

31. What does static electricity do?
Serial
Does not move
Energy
Current flows in one direction - potential differences across a load does not change(Both A and B)

32. What is the unit of measurement of electrical current?
Bonding and grounding
Cables
Mutual induction
Amperes

33. What determines the resistance of a resistor?
Symbol
Moving vehicles
Composition of the resistor
Energy

34. What is a switch that operates by electricity?
The direction of the magnetic field
Relay
Fixed - Electrolytic - Variable(all of the above)
Porcelain

35. What is voltage?
How much potential difference can a material withstand before breaking down
Ability to store an electric charge
A difference in potential energy
Opposes any change in the current flowing in a circuit

36. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
12 volts
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)
Potential difference

37. What is the relationship between cells and batteries?
Fixed - Electrolytic - Variable(all of the above)
Cells can be connected together to make a battery
Silver
Bonding and grounding

38. Which way is the current going in the circuit shown?(electron flow)
Porcelain
From the negative battery terminal to the positive terminal
Two
Purging

39. What is a way to classify wires and cables?
Volts
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Relationship between current and potential difference
By their covering

40. What is the purpose of resistors in electrical circuits?
Heat
Relationship between current and potential difference
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Produce heat - light - or limit current to control it(all of the above)

41. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
A difference in potential energy
Electrical resistance against the flow of current
First digit is 9

42. What does a transformer transform?
The relationship of potential difference to current
Breakdown voltage
The rate of doing work
Symbol

43. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel circuit
Parallel
Stranded
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)

44. What is resistance?
Opposition to movement of free electrons
Symbol
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)
50 Ohms

45. A resistor is color coded brown - green - orange. What is its resistance?
Symbol
From the negative battery terminal to the positive terminal
15 -000 ohms - 20%
Electromagnetic field

46. Why is the transformer important to AC electricity?

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47. What is a wire classification?
Cables
DC current
Fixed - Electrolytic - Variable(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)

48. What is the unit of measurement of potential difference?
Volts
Symbol
15 -000 ohms - 20%
DC current

49. What does a moving charge produce?
Purging
Mutual induction
Parallel circuit
A magnetic field

50. What is the type of cable composed of many fine wires?
10%
The rate of doing work
Fixed - tapped - variable(all of the above)
Stranded