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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 the term used when a magnetic field produced by coil 1 created a current in coil 2?
--^V^V^V^---
A magnetic field
Heat
Mutual induction

2. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
Volts
12 volts
Moving vehicles

3. What does a transformer transform?
Common - not rechargable - gradually discharges when in storage(All of the above)
Voltage
The relationship of potential difference to current
Area and spacing of capacitor - static current in the capacitor(both A and B)

4. What is needed for electric heating elements and the filaments of light bulbs?
The direction the negative charge moves
How much potential difference can a material withstand before breaking down
High resistance
Mutual induction

5. What do junction boxes protect?
Wire splices
Electrical resistance against the flow of current
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
From the negative battery terminal to the positive terminal

6. What does a first band of white mean?
Circular and square mills(Both A and B)
Heat
50 Ohms
First digit is 9

7. What does resistance produce?
American wire gauge(AWG)
Heat
Fixed - Electrolytic - Variable(all of the above)
Solenoid and Relay(both A and B)

8. What is the relationship between magnetism and electricity?
Cables
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)
50 Ohms
Wire splices

9. What can permanently break down a capacitor?
From the negative battery terminal to the positive terminal
Breakdown voltage
Heat and current control(both a and c)
Magnetic properties

10. What type of circuit has two or more paths for current to follow?
Volts
Parallel circuit
5%
Cells can be connected together to make a battery

11. What is the purpose of resistors in electrical circuits?
Plastic - Rubber - Friction(all of the above)
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)
Breakdown voltage

12. The generator is what method of creating potential energy?
Opposes any change in the current flowing in a circuit
Electromagnetism
Electrical resistance against the flow of current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

13. What does an object have if a magnetic field acts on it?
Magnetic properties
Secondary cell
Symbol
Porcelain

14. What is the term for two or more cells attached together?
Opposes any change in the current flowing in a circuit
Ohms
Battery
Use an effect to produce another effect

15. What does static electricity do?
Does not move
High resistance
Relationship between current and potential difference
From the negative battery terminal to the positive terminal

16. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
Energy
Produce heat - light - or limit current to control it(all of the above)
Strength of the charge

17. What does a third band of brown mean?
Current change in a coil creates a magnetic change
10
Stranded
Parallel circuit

18. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)
Plastic - Rubber - Friction(all of the above)

19. What do electrical charges need to cause a fire or explosion?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Energy
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)

20. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Opposition to movement of free electrons
Volts
1/1000th of an inch

21. 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
12 volts
Wire splices
Resistance increases as the conductor length increases
The rate of doing work

22. What is an electromagnet?
Magnetic properties
Bonding and grounding
Electromagnetic field
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

23. What is the relationship between cells and batteries?
Ohms
Silver
Cells can be connected together to make a battery
Serial

24. What do we call the ability to do work?
Composition of the resistor
Silver
Energy
Chemical action

25. Identify the blueprint symbol for resistors.
75 Ohms
--^V^V^V^---
Does not move
Porcelain

26. To what measurement do the conductor mills refer?
1/1000th of an inch
Common - not rechargable - gradually discharges when in storage(All of the above)
Voltmeter
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

27. What are the common units of measurement for round and square conductor cross - sections?
Cell
Electromagnetism
Circular and square mills(Both A and B)
Use an effect to produce another effect

28. What makes electrons flow?
Potential difference
Cells can be connected together to make a battery
Resistance increases as the conductor length increases
American wire gauge(AWG)

29. When does a DC circuit oppose current flow?
A magnetic field
Amperes
1 watt
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

30. What is voltage?
A difference in potential energy
Fixed - tapped - variable(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Voltage

31. What determines whether a spark can be produced?
Insulation resistance
Parallel circuit
Strength of the charge
--^V^V^V^---

32. What is the fundamental property of insulators?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Electromagnetic field
10%
Insulation resistance and Dielectric strength(Both A and B)

33. What type of circuit has one path of follow through a load?
Series circuit
The relationship of potential difference to current
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Ohms

34. What is a DC circuit characteristic?
12 volts
Current flows in one direction - potential differences across a load does not change(Both A and B)
Volts
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

35. What is the basic law of magnetic force?
Potential difference
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Fixed - tapped - variable(all of the above)
Unlike poles attract

36. What does a moving charge produce?
Insulation resistance
Grounding wire
Amperes
A magnetic field

37. When reading resistance color codes - what does the fourth band indicate?
The direction the negative charge moves
Bonding and grounding
Does not move
Tolerence

38. What is induction?
Ohms
A magnetic field
Current change in a coil creates a magnetic change
10

39. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Resistance increases as the conductor length increases
5%
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Composition of the resistor

40. How is capacitance determined?
Area and spacing of capacitor - static current in the capacitor(both A and B)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Energy
American wire gauge(AWG)

41. Which of the following is a type of resistor?
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)
Fixed - tapped - variable(all of the above)
Resistance value can not be changed

42. What is an arrangement of materials that create a potential difference by chemistry?
Cell
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Parallel
Two

43. When reading resistance color codes - what does the first band indicate?
DC flows continuously in one direction and AC potential difference and current both change direction
Voltmeter
First digit
Wire splices

44. Which way is the current going in the circuit shown?(electron flow)
Purging
Opposes any change in the current flowing in a circuit
From the negative battery terminal to the positive terminal
Potential difference

45. What is the relationship of conductor size and length to resistance?
Secondary cell
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Resistance increases as the conductor length increases
Opposition to movement of free electrons

46. What results when current is run through a material with high resistance?
10%
Heat and current control(both a and c)
Heat
Gauge number

47. Where does the thumb point in both Left-Hand Rules?
Potential difference - E*I - current times current change from point to point(all of the above)
The direction the negative charge moves
Electrical resistance against the flow of current
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

48. What is the name for electrical resistance of insulation?
Alternating current
75 Ohms
Current flows in one direction - potential differences across a load does not change(Both A and B)
Insulation resistance

49. 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
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
75 Ohms
50 Ohms
Amperes

50. What is the measure of potential difference?
Stores electrical charge
Parallel
Volts
--^V^V^V^---