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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 a common cause of static electricity in a shop?
Ability to store an electric charge
Moving vehicles
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)
10%

2. What is voltage?
5%
A difference in potential energy
Series circuit
The direction of the magnetic field

3. What is the relationship of conductor size and length to resistance?
Circular and square mills(Both A and B)
Insulation resistance and Dielectric strength(Both A and B)
Resistance increases as the conductor length increases
Heat

4. What instrument measures voltage?
Voltage
Parallel circuit
Choke
Voltmeter

5. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Insulation resistance
Circular and square mills(Both A and B)
Parallel
The direction of the magnetic field

6. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Start with the band on the end and read to the center
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Mutual induction
Stranded

7. What does a third band of brown mean?
A difference in potential energy
Amperes
10
75 Ohms

8. How do static charges distribute themselves?
Heat
10%
American wire gauge(AWG)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

9. What does a moving charge produce?
Stranded
A magnetic field
Potential difference
15 -000 ohms - 20%

10. What is the name for electrical resistance of insulation?
Insulation resistance
Tolerence
Plastic - Rubber - Friction(all of the above)
Voltage

11. What is resistance in electrical terms?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Volts
Opposition to electrical current
Strength of the charge

12. What is resistance?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
A magnetic field
Volts
Opposition to movement of free electrons

13. How is the heat production measured in a resistor?
Parallel circuit
Potential difference - E*I - current times current change from point to point(all of the above)
1/1000th of an inch
Unlike poles attract

14. Which way is the current going in the circuit shown?(electron flow)
Heat
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
From the negative battery terminal to the positive terminal
Resistance value can not be changed

15. What is capacitance in electrical terms?
Ability to store an electric charge
Relay
Battery
50 Ohms

16. What do junction boxes protect?
First digit is 9
Wire splices
Unlike poles attract
Volts

17. What must be large enough to carry the largest current likely to occur?
Opposition to electrical current
Grounding wire
Common - not rechargable - gradually discharges when in storage(All of the above)
Electromagnetism

18. What does an object have if a magnetic field acts on it?
Opposes any change in the current flowing in a circuit
Unlike poles attract
Magnetic properties
A difference in potential energy

19. What does static electricity do?
Grounding wire
Area and spacing of capacitor - static current in the capacitor(both A and B)
Does not move
Relay

20. 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
Potential difference
12 volts
Cells can be connected together to make a battery
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)

21. What type of circuit has one path of follow through a load?
Series circuit
The direction the negative charge moves
First digit is 9
A magnetic field

22. What is a characteristic of insulators?
Electromagnetic field
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Purging
By their covering

23. What is the basic law of magnetic force?
Insulation resistance
Silver
Volts
Unlike poles attract

24. How do you read resistor color codes?
Insulation resistance and Dielectric strength(Both A and B)
Start with the band on the end and read to the center
First digit
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

25. What is an electromagnet?
Opposition to electrical current
Two
Amperes
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

26. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
1/1000th of an inch
5%
Resistance increases as the conductor length increases
Parallel

27. What is induction?
Stores electrical charge
Insulation resistance
Ability to store an electric charge
Current change in a coil creates a magnetic change

28. What determines whether a spark can be produced?
Purging
Strength of the charge
Grounding wire
Tolerence

29. Which type of cell can be recharged?
Electrical resistance against the flow of current
Start with the band on the end and read to the center
Secondary cell
Plastic - Rubber - Friction(all of the above)

30. What is a DC circuit characteristic?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Opposes any change in the current flowing in a circuit
Heat and current control(both a and c)
Current flows in one direction - potential differences across a load does not change(Both A and B)

31. What do electrical charges need to cause a fire or explosion?
Relationship between current and potential difference
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Voltage
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

32. What is a property of inductors in electrical circuits?
Bare - covered - insulated - stranded - cable(All of the above)
Symbol
Opposes any change in the current flowing in a circuit
Tolerence

33. Identify the general blueprint symbol for inductors.
Fixed - Electrolytic - Variable(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Symbol

34. How many kinds of poles do magnets have?
Moving vehicles
Two
Cables
Produce heat - light - or limit current to control it(all of the above)

35. What do transducers do in electrical terms?
Fixed - Electrolytic - Variable(all of the above)
Use an effect to produce another effect
Gauge number
Bare - covered - insulated - stranded - cable(All of the above)

36. When does a DC circuit oppose current flow?
Heat
--^V^V^V^---
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
First digit is 9

37. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
First digit
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
50 Ohms
Insulation resistance and Dielectric strength(Both A and B)

38. The dry cell is what method for creating potential energy?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Volts
Chemical action
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

39. What is an arrangement of materials that create a potential difference by chemistry?
Cell
American wire gauge(AWG)
Breakdown voltage
Moving vehicles

40. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
DC current
Moving vehicles
10

41. What makes electrons flow?
Volts
Potential difference
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

42. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Does not move
Mutual induction
Circular and square mills(Both A and B)
Voltage

43. What results when current is run through a material with high resistance?
Breakdown voltage
First digit
Heat and current control(both a and c)
Volts

44. What is the unit of measurement of electrical current?
Amperes
75 Ohms
How much potential difference can a material withstand before breaking down
1 watt

45. Identify the blueprint symbol for capacitors.
Ohms
Common - not rechargable - gradually discharges when in storage(All of the above)
Symbol
Opposition to movement of free electrons

46. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Opposes any change in the current flowing in a circuit
Symbol
Resistance increases as the conductor length increases

47. What is the difference between AC and DC?
The direction of the magnetic field
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 flows continuously in one direction and AC potential difference and current both change direction
Parallel circuit

48. What do we call the ability to do work?
Energy
Stores electrical charge
Grounding wire
First digit is 9

49. Identify the blueprint symbol for resistors.
Porcelain
--^V^V^V^---
Two
Parallel

50. What is insulation resistance?
Volts
Start with the band on the end and read to the center
The relationship of potential difference to current
Electrical resistance against the flow of current