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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. Which way is the current going in the circuit shown?(electron flow)
Serial
From the negative battery terminal to the positive terminal
Purging
Start with the band on the end and read to the center

2. What is the unit of measurement of potential difference?
First digit is 9
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)
Circular and square mills(Both A and B)
Volts

3. What do we call the ability to do work?
Electromagnetism
Energy
High resistance
Resistance increases as the conductor length increases

4. What is the unit of measurement of electrical current?
Amperes
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)
Insulation resistance and Dielectric strength(Both A and B)

5. Which of the following materials is NOT a good conductor?
Voltage
Porcelain
Grounding wire
Breakdown voltage

6. How is capacitance determined?
Circular and square mills(Both A and B)
Area and spacing of capacitor - static current in the capacitor(both A and B)
75 Ohms
Alternating current

7. When reading resistance color codes - what does the first band indicate?
First digit
Cables
Insulation resistance and Dielectric strength(Both A and B)
Stranded

8. What is the relationship between cells and batteries?
Plastic - Rubber - Friction(all of the above)
Cells can be connected together to make a battery
Potential difference - E*I - current times current change from point to point(all of the above)
Opposition to movement of free electrons

9. What does a third band of brown mean?
Potential difference
10
Silver
Relationship between current and potential difference

10. What is voltage?
Potential difference
Relationship between current and potential difference
A difference in potential energy
Grounding wire

11. Which of the following is a type of resistor?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Opposes any change in the current flowing in a circuit
Amperes
Fixed - tapped - variable(all of the above)

12. What is a type of mechanical transducer?
Serial
Stores electrical charge
By their covering
Solenoid and Relay(both A and B)

13. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Bare - covered - insulated - stranded - cable(All of the above)
50 Ohms

14. How is the heat production measured in a resistor?
Circular and square mills(Both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)
Parallel
Alternating current

15. What is a common form used in conductors?
Cables
Common - not rechargable - gradually discharges when in storage(All of the above)
Grounding wire
Symbol

16. What does an object have if a magnetic field acts on it?
Resistance increases as the conductor length increases
Does not move
Magnetic properties
Solenoid and Relay(both A and B)

17. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
DC current
Symbol
Porcelain

18. How many kinds of poles do magnets have?
The direction of the magnetic field
Two
Volts
Volts

19. What is insulation resistance?
Grounding wire
Stranded
Electrical resistance against the flow of current
Magnetic properties

20. What are the names of two of the six primary methods of producing a voltage?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Heat
Stranded
Mutual induction

21. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Magnetic properties
Alternating current
Purging
The relationship of potential difference to current

22. What makes electrons flow?
Potential difference
15 -000 ohms - 20%
5%
First digit

23. What is a characteristic of insulators?
From the negative battery terminal to the positive terminal
Bare - covered - insulated - stranded - cable(All of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Volts

24. What is dielectric strength?
How much potential difference can a material withstand before breaking down
Ohms
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Insulation resistance

25. What is a way to classify wires and cables?
The direction of the magnetic field
10%
Electrical resistance against the flow of current
By their covering

26. What is a common measure of wire diameter?
Use an effect to produce another effect
Gauge number
Potential difference
1 watt

27. Which material has the lowest resistance at ordinary temperatures?
Opposition to electrical current
Unlike poles attract
Silver
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

28. What is a switch that operates by electricity?
Relay
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Relationship between current and potential difference
10%

29. What does a first band of white mean?
Chemical action
Bonding and grounding
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
First digit is 9

30. What makes electrons flow?
Potential difference
Insulation resistance
1 watt
Grounding wire

31. What do junction boxes protect?
Choke
Wire splices
Opposes any change in the current flowing in a circuit
Symbol

32. How do you read resistor color codes?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
The direction of the magnetic field
Start with the band on the end and read to the center
Electromagnetism

33. What is true about a dry cell?
Tolerence
Common - not rechargable - gradually discharges when in storage(All of the above)
Secondary cell
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)

34. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel circuit
Porcelain
Parallel
Alternating current

35. What is a characteristic of a fixed resistor?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
10%
Voltmeter
Resistance value can not be changed

36. What is a conductor?
Common - not rechargable - gradually discharges when in storage(All of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
15 -000 ohms - 20%
Moving vehicles

37. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
Alternating current
Parallel
Solenoid and Relay(both A and B)

38. What does a transformer transform?
The relationship of potential difference to current
20%
Amperes
Bare - covered - insulated - stranded - cable(All of the above)

39. What does a moving charge produce?
Mutual induction
5%
A magnetic field
From the negative battery terminal to the positive terminal

40. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Alternating current
The rate of doing work
Symbol

41. Where do the fingers point in both Left-Hand Rules?
Resistance increases as the conductor length increases
Chemical action
Produce heat - light - or limit current to control it(all of the above)
The direction of the magnetic field

42. What is capacitance in electrical terms?
50 Ohms
Common - not rechargable - gradually discharges when in storage(All of the above)
Ability to store an electric charge
Volts

43. What is a property of inductors in electrical circuits?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Strength of the charge
Opposes any change in the current flowing in a circuit
Bonding and grounding

44. Identify the general blueprint symbol for inductors.
Circular and square mills(Both A and B)
Symbol
High resistance
Solenoid and Relay(both A and B)

45. What is the term for two or more cells attached together?
Mutual induction
Opposition to electrical current
Battery
Tolerence

46. What is resistance in electrical terms?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Produce heat - light - or limit current to control it(all of the above)
Ohms
Opposition to electrical current

47. What do transducers do in electrical terms?
Serial
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Use an effect to produce another effect

48. When reading resistance color codes - what does the fourth band indicate?
Tolerence
10%
Two
Porcelain

49. What does Ohm's Law represent?
Relationship between current and potential difference
20%
Silver
Resistance increases as the conductor length increases

50. What is resistance?
From the negative battery terminal to the positive terminal
Energy
Opposition to movement of free electrons
1 watt