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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 one path of follow through a load?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Unlike poles attract
Series circuit
Current flows in one direction - potential differences across a load does not change(Both A and B)

2. What is capacitance in electrical terms?
Fixed - Electrolytic - Variable(all of the above)
Insulation resistance
Ability to store an electric charge
Symbol

3. 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
Two
Area and spacing of capacitor - static current in the capacitor(both A and B)
Fixed - tapped - variable(all of the above)

4. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
DC current
Cell
Heat

5. What is needed for electric heating elements and the filaments of light bulbs?
Gauge number
Heat and current control(both a and c)
Electromagnetism
High resistance

6. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
1 watt
Porcelain

7. What do junction boxes protect?
Current change in a coil creates a magnetic change
--^V^V^V^---
Wire splices
Ohms

8. What makes electrons flow?
Grounding wire
Parallel circuit
Potential difference
By their covering

9. How many kinds of poles do magnets have?
Two
Opposition to movement of free electrons
Chemical action
Cells can be connected together to make a battery

10. What is dielectric strength?
The rate of doing work
Relationship between current and potential difference
Moving vehicles
How much potential difference can a material withstand before breaking down

11. What is voltage?
Stranded
Bare - covered - insulated - stranded - cable(All of the above)
Solenoid and Relay(both A and B)
A difference in potential energy

12. What is a characteristic of a fixed resistor?
Potential difference
Ability to store an electric charge
20%
Resistance value can not be changed

13. What is a switch that operates by electricity?
Stranded
Breakdown voltage
Relay
Start with the band on the end and read to the center

14. What does Ohm's Law represent?
Opposition to electrical current
Relationship between current and potential difference
Potential difference
Composition of the resistor

15. 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
75 Ohms
Cell
Voltmeter

16. What is the basic law of magnetic force?
Potential difference
Gauge number
Unlike poles attract
Moving vehicles

17. What is a characteristic of insulators?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
From the negative battery terminal to the positive terminal
Produce heat - light - or limit current to control it(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

18. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Wire splices
Cells can be connected together to make a battery
5%

19. What is the unit of measurement of electrical current?
Amperes
Moving vehicles
Parallel circuit
Cables

20. What is an arrangement of materials that create a potential difference by chemistry?
Cell
Series circuit
Electrical resistance against the flow of current
Two

21. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
Purging
Current change in a coil creates a magnetic change
Moving vehicles

22. Which way is the current going in the circuit shown?(electron flow)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
From the negative battery terminal to the positive terminal
By their covering
Plastic - Rubber - Friction(all of the above)

23. What is the type of cable composed of many fine wires?
High resistance
Circular and square mills(Both A and B)
Parallel
Stranded

24. What is a type of mechanical transducer?
The rate of doing work
Solenoid and Relay(both A and B)
Composition of the resistor
Secondary cell

25. What makes electrons flow?
Moving vehicles
Symbol
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Potential difference

26. What does a first band of white mean?
Symbol
--^V^V^V^---
First digit is 9
Opposition to electrical current

27. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Bare - covered - insulated - stranded - cable(All of the above)
Ohms
Choke
10%

28. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
The direction the negative charge moves
Series circuit
Secondary cell

29. What is a wire classification?
Heat
High resistance
Bare - covered - insulated - stranded - cable(All of the above)
10

30. To what measurement do the conductor mills refer?
1/1000th of an inch
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Energy
Circular and square mills(Both A and B)

31. The thermocouple uses which method for creating potential energy?
Energy
Does not move
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Heat

32. What is the term for two or more cells attached together?
Fixed - tapped - variable(all of the above)
Symbol
Battery
Relationship between current and potential difference

33. A resistor is color coded brown - green - orange. What is its resistance?
15 -000 ohms - 20%
American wire gauge(AWG)
Electromagnetism
Composition of the resistor

34. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
Circular and square mills(Both A and B)
Choke
How much potential difference can a material withstand before breaking down

35. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
20%
Series circuit
How much potential difference can a material withstand before breaking down

36. What is a rigid metal conduit?
Relationship between current and potential difference
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Heat
Fixed - tapped - variable(all of the above)

37. How do you read resistor color codes?
Stranded
Amperes
Opposes any change in the current flowing in a circuit
Start with the band on the end and read to the center

38. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
The direction of the magnetic field
Solenoid and Relay(both A and B)
Voltmeter

39. What is insulation resistance?
Cables
Mutual induction
Opposition to movement of free electrons
Electrical resistance against the flow of current

40. What is the relationship between cells and batteries?
The rate of doing work
How much potential difference can a material withstand before breaking down
Cell
Cells can be connected together to make a battery

41. What do transducers do in electrical terms?
Current change in a coil creates a magnetic change
Potential difference - E*I - current times current change from point to point(all of the above)
Symbol
Use an effect to produce another effect

42. Why is the transformer important to AC electricity?

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43. What is power?
DC current
Parallel
Symbol
The rate of doing work

44. Identify the blueprint symbol for resistors.
Mutual induction
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
--^V^V^V^---
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

45. What does an object have if a magnetic field acts on it?
--^V^V^V^---
1 watt
Magnetic properties
The direction of the magnetic field

46. What is another name for an inductor?
20%
A magnetic field
Opposition to electrical current
Choke

47. The generator is what method of creating potential energy?
Electromagnetism
Current change in a coil creates a magnetic change
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 material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

48. What is the unit of measurement of potential difference?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Opposition to movement of free electrons
Volts
Symbol

49. What results when current is run through a material with high resistance?
Serial
Heat and current control(both a and c)
Symbol
Relationship between current and potential difference

50. What is a way to classify wires and cables?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
5%
Tolerence
By their covering