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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. 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
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Volts
Battery

2. How many kinds of poles do magnets have?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
10
Two
Stranded

3. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Potential difference
Ability to store an electric charge
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

4. How is the heat production measured in a resistor?
Wire splices
Potential difference - E*I - current times current change from point to point(all of the above)
Start with the band on the end and read to the center
Common - not rechargable - gradually discharges when in storage(All of the above)

5. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Grounding wire
Fixed - tapped - variable(all of the above)

6. What is the name for electrical resistance of insulation?
Chemical action
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
A magnetic field

7. What is another name for an inductor?
Heat
Start with the band on the end and read to the center
Choke
Current flows in one direction - potential differences across a load does not change(Both A and B)

8. What does an object have if a magnetic field acts on it?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Magnetic properties
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Plastic - Rubber - Friction(all of the above)

9. What is insulation resistance?
Bare - covered - insulated - stranded - cable(All of the above)
Ohms
Volts
Electrical resistance against the flow of current

10. What makes electrons flow?
75 Ohms
1/1000th of an inch
Cell
Potential difference

11. Which type of cell can be recharged?
Plastic - Rubber - Friction(all of the above)
Secondary cell
Wire splices
Ohms

12. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Strength of the charge
Voltmeter
Serial
Parallel

13. Why is the transformer important to AC electricity?

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14. What is the type of cable composed of many fine wires?
Plastic - Rubber - Friction(all of the above)
From the negative battery terminal to the positive terminal
Symbol
Stranded

15. What is the unit of measurement of electrical current?
Amperes
Heat and current control(both a and c)
Electromagnetism
Start with the band on the end and read to the center

16. What does a transformer transform?
Mutual induction
Unlike poles attract
Tolerence
The relationship of potential difference to current

17. A resistor is color coded brown - green - orange. What is its resistance?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Fixed - tapped - variable(all of the above)
15 -000 ohms - 20%
1/1000th of an inch

18. In most applications - what remains constant if the current remains constant and flows in one direction?
American wire gauge(AWG)
Current change in a coil creates a magnetic change
Moving vehicles
Electromagnetic field

19. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
Silver
Electromagnetism
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

20. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Cells can be connected together to make a battery
50 Ohms
Resistance value can not be changed
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

21. The dry cell is what method for creating potential energy?
A magnetic field
Start with the band on the end and read to the center
Voltage
Chemical action

22. What are the names of two of the six primary methods of producing a voltage?
5%
Plastic - Rubber - Friction(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Volts

23. What is the term for two or more cells attached together?
Battery
From the negative battery terminal to the positive terminal
Parallel
Electromagnetic field

24. What is the fundamental property of insulators?
Circular and square mills(Both A and B)
Tolerence
Insulation resistance and Dielectric strength(Both A and B)
DC flows continuously in one direction and AC potential difference and current both change direction

25. What cannot be transformed to higher or lower potential differences?
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)
DC current
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
5%

26. What does a moving charge produce?
A magnetic field
Parallel
Opposition to electrical current
How much potential difference can a material withstand before breaking down

27. What is the difference between AC and DC?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
Cells can be connected together to make a battery
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

28. What is induction?
Chemical action
Start with the band on the end and read to the center
Voltage
Current change in a coil creates a magnetic change

29. What is the relationship of conductor size and length to resistance?
Ohms
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)
Resistance increases as the conductor length increases
Cables

30. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Voltage
Cells can be connected together to make a battery
Cables
5%

31. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Voltage
The direction of the magnetic field
American wire gauge(AWG)

32. The generator is what method of creating potential energy?
Voltage
By their covering
10
Electromagnetism

33. What does static electricity do?
Relay
Does not move
Gauge number
Amperes

34. What is an arrangement of materials that create a potential difference by chemistry?
Electrical resistance against the flow of current
Cell
Opposition to electrical current
Wire splices

35. What is the term for doing work at the rate of joule per second?
How much potential difference can a material withstand before breaking down
Start with the band on the end and read to the center
1 watt
DC flows continuously in one direction and AC potential difference and current both change direction

36. When does a DC circuit oppose current flow?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Mutual induction
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

37. What type of circuit has two or more paths for current to follow?
DC flows continuously in one direction and AC potential difference and current both change direction
Parallel circuit
10
Opposition to movement of free electrons

38. What do we call the ability to do work?
Heat
Insulation resistance and Dielectric strength(Both A and B)
Energy
Potential difference

39. What is the unit of measurement of resistance?
Ohms
Potential difference - E*I - current times current change from point to point(all of the above)
15 -000 ohms - 20%
First digit is 9

40. What is the unit of measurement of potential difference?
Chemical action
Choke
Volts
1 watt

41. What is needed for electric heating elements and the filaments of light bulbs?
Serial
Magnetic properties
High resistance
Relationship between current and potential difference

42. What do transducers do in electrical terms?
Electromagnetism
Cells can be connected together to make a battery
1 watt
Use an effect to produce another effect

43. What is a type of mechanical transducer?
Voltmeter
American wire gauge(AWG)
Solenoid and Relay(both A and B)
High resistance

44. What is a conductor?
Does not move
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
12 volts
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

45. Which of the following is a type of resistor?
A difference in potential energy
Resistance increases as the conductor length increases
Fixed - tapped - variable(all of the above)
Silver

46. How is capacitance determined?
--^V^V^V^---
Area and spacing of capacitor - static current in the capacitor(both A and B)
Relay
Heat

47. What type of circuit has one path of follow through a load?
Opposition to movement of free electrons
Series circuit
Moving vehicles
Heat and current control(both a and c)

48. What types of protective tapes are used?
Common - not rechargable - gradually discharges when in storage(All of the above)
Electrical resistance against the flow of current
Plastic - Rubber - Friction(all of the above)
Strength of the charge

49. What does resistance produce?
50 Ohms
Current flows in one direction - potential differences across a load does not change(Both A and B)
A difference in potential energy
Heat

50. What is a way to classify wires and cables?
Breakdown voltage
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)