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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 fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Stranded
Alternating current
Strength of the charge

2. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Porcelain
1/1000th of an inch
Circular and square mills(Both A and B)

3. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Start with the band on the end and read to the center
Composition of the resistor
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

4. What is a rigid metal conduit?
A difference in potential energy
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Electromagnetic field
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

5. When reading resistance color codes - what does the first band indicate?
Cell
First digit
Electromagnetism
Opposition to electrical current

6. How is capacitance determined?
Area and spacing of capacitor - static current in the capacitor(both A and B)
DC flows continuously in one direction and AC potential difference and current both change direction
20%
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)

7. What is resistance?
Start with the band on the end and read to the center
First digit is 9
The relationship of potential difference to current
Opposition to movement of free electrons

8. What is a DC circuit characteristic?
Moving vehicles
Series circuit
Current flows in one direction - potential differences across a load does not change(Both A and B)
Ability to store an electric charge

9. What is the unit of measurement of electrical current?
Amperes
Grounding wire
First digit
Cables

10. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Insulation resistance
Mutual induction
75 Ohms
Moving vehicles

11. Which of the following is a type of resistor?
Battery
Breakdown voltage
Heat
Fixed - tapped - variable(all of the above)

12. A resistor is color coded brown - green - orange. What is its resistance?
DC flows continuously in one direction and AC potential difference and current both change direction
Volts
Plastic - Rubber - Friction(all of the above)
15 -000 ohms - 20%

13. What does a first band of white mean?
Resistance value can not be changed
First digit is 9
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

14. What is a type of capacitor?
DC flows continuously in one direction and AC potential difference and current both change direction
Plastic - Rubber - Friction(all of the above)
The rate of doing work
Fixed - Electrolytic - Variable(all of the above)

15. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
1/1000th of an inch
First digit
DC current

16. What does an object have if a magnetic field acts on it?
Magnetic properties
Resistance value can not be changed
Opposition to electrical current
Composition of the resistor

17. How many kinds of poles do magnets have?
Fixed - tapped - variable(all of the above)
Electrical resistance against the flow of current
Two
Ohms

18. What cannot be transformed to higher or lower potential differences?
Tolerence
DC current
Heat and current control(both a and c)
Serial

19. What is voltage?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
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)
Does not move
A difference in potential energy

20. What can permanently break down a capacitor?
Resistance increases as the conductor length increases
75 Ohms
Breakdown voltage
From the negative battery terminal to the positive terminal

21. What type of circuit has two or more paths for current to follow?
Choke
Unlike poles attract
DC current
Parallel circuit

22. What is dielectric strength?
DC flows continuously in one direction and AC potential difference and current both change direction
How much potential difference can a material withstand before breaking down
Strength of the charge
Relay

23. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
Does not move
Heat and current control(both a and c)
Series circuit

24. 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
Cell
Chemical action
Symbol
75 Ohms

25. What is the relationship between magnetism and electricity?
A difference in potential energy
Circular and square mills(Both A and B)
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)
--^V^V^V^---

26. How do you read resistor color codes?
Plastic - Rubber - Friction(all of the above)
Start with the band on the end and read to the center
12 volts
Heat and current control(both a and c)

27. What type of circuit has one path of follow through a load?
75 Ohms
Start with the band on the end and read to the center
The relationship of potential difference to current
Series circuit

28. What is capacitance in electrical terms?
Relay
Ability to store an electric charge
The direction the negative charge moves
Ohms

29. Where do the fingers point in both Left-Hand Rules?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Plastic - Rubber - Friction(all of the above)
The direction of the magnetic field
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

30. What is the unit of measurement of resistance?
Resistance increases as the conductor length increases
Produce heat - light - or limit current to control it(all of the above)
First digit is 9
Ohms

31. What is the term for two or more cells attached together?
Resistance increases as the conductor length increases
From the negative battery terminal to the positive terminal
Battery
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

32. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Produce heat - light - or limit current to control it(all of the above)
The rate of doing work
Opposition to movement of free electrons
50 Ohms

33. What makes electrons flow?
Symbol
Potential difference
Parallel circuit
Area and spacing of capacitor - static current in the capacitor(both A and B)

34. What is the type of cable composed of many fine wires?
The direction the negative charge moves
Cell
Stranded
Ability to store an electric charge

35. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Fixed - tapped - variable(all of the above)
Relay
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
20%

36. What is a common measure of wire diameter?
Resistance value can not be changed
Gauge number
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Tolerence

37. What is the unit of measurement of potential difference?
The direction the negative charge moves
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)
Volts
Potential difference - E*I - current times current change from point to point(all of the above)

38. What does Ohm's Law represent?
Relationship between current and potential difference
Potential difference
75 Ohms
First digit

39. What is insulation resistance?
Strength of the charge
Opposition to electrical current
Electrical resistance against the flow of current
Serial

40. What does a transformer transform?
Resistance increases as the conductor length increases
Unlike poles attract
Serial
The relationship of potential difference to current

41. What is the basic law of magnetic force?
Secondary cell
Cables
Area and spacing of capacitor - static current in the capacitor(both A and B)
Unlike poles attract

42. What must be large enough to carry the largest current likely to occur?
Grounding wire
Potential difference
Heat
Moving vehicles

43. What is the name for electrical resistance of insulation?
Insulation resistance
Ability to store an electric charge
From the negative battery terminal to the positive terminal
Breakdown voltage

44. What is an electromagnet?
First digit
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
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)
Cells can be connected together to make a battery

45. What do we call the ability to do work?
Circular and square mills(Both A and B)
Energy
Parallel circuit
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

46. What do transducers do in electrical terms?
75 Ohms
Composition of the resistor
Use an effect to produce another effect
Tolerence

47. Why is the transformer important to AC electricity?

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48. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Use an effect to produce another effect
Alternating current
Volts
10

49. When reading resistance color codes - what does the fourth band indicate?
Start with the band on the end and read to the center
Cell
From the negative battery terminal to the positive terminal
Tolerence

50. What information do the Left-Hand Rules provide?
Symbol
Electromagnetism
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Battery