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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 induction?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Produce heat - light - or limit current to control it(all of the above)
Current change in a coil creates a magnetic change
Opposes any change in the current flowing in a circuit

2. What must be large enough to carry the largest current likely to occur?
Grounding wire
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Cables
Unlike poles attract

3. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Symbol
Moving vehicles
--^V^V^V^---

4. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
A magnetic field
First digit
10%

5. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
1 watt
Potential difference
By their covering

6. What makes electrons flow?
Electromagnetism
Potential difference
Purging
DC current

7. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Gauge number
Serial
The direction the negative charge moves
Secondary cell

8. What is the term for doing work at the rate of joule per second?
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)
10
Area and spacing of capacitor - static current in the capacitor(both A and B)
1 watt

9. What is the name for electrical resistance of insulation?
Insulation resistance
Choke
Potential difference
Electrical resistance against the flow of current

10. What is the relationship between cells and batteries?
Gauge number
Opposition to movement of free electrons
Cells can be connected together to make a battery
Heat

11. 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
Stores electrical charge
Voltage
75 Ohms
Energy

12. A resistor is color coded brown - green - orange. What is its resistance?
Insulation resistance
The direction of the magnetic field
10%
15 -000 ohms - 20%

13. The thermocouple uses which method for creating potential energy?
Heat
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Plastic - Rubber - Friction(all of the above)
Grounding wire

14. What is the purpose of a raceway?
Composition of the resistor
Solenoid and Relay(both A and B)
Parallel
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

15. What makes electrons flow?
Potential difference
Circular and square mills(Both A and B)
Fixed - Electrolytic - Variable(all of the above)
The relationship of potential difference to current

16. When reading resistance color codes - what does the first band indicate?
First digit
20%
15 -000 ohms - 20%
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

17. What can permanently break down a capacitor?
Breakdown voltage
DC current
20%
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

18. What type of circuit has two or more paths for current to follow?
Electromagnetism
Use an effect to produce another effect
The direction of the magnetic field
Parallel circuit

19. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
The rate of doing work
Purging
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)

20. What does a third band of brown mean?
10
Start with the band on the end and read to the center
Cables
Parallel

21. What is another name for an inductor?
Bare - covered - insulated - stranded - cable(All of the above)
Insulation resistance
20%
Choke

22. What do we call the ability to do work?
Relationship between current and potential difference
Energy
Stranded
Cells can be connected together to make a battery

23. What is a characteristic of a fixed resistor?
Resistance value can not be changed
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)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Parallel

24. Which type of cell can be recharged?
Electromagnetic field
5%
Secondary cell
Heat

25. What is dielectric strength?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Heat
How much potential difference can a material withstand before breaking down

26. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
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)
Parallel

27. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
5%
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Electrical resistance against the flow of current

28. How is the heat production measured in a resistor?
Two
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)
Potential difference - E*I - current times current change from point to point(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction

29. When does a DC circuit oppose current flow?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Purging
Symbol
Potential difference

30. Where do the fingers point in both Left-Hand Rules?
20%
The direction of the magnetic field
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Circular and square mills(Both A and B)

31. What is capacitance in electrical terms?
Ability to store an electric charge
75 Ohms
Use an effect to produce another effect
Start with the band on the end and read to the center

32. What is a common cause of static electricity in a shop?
Voltage
75 Ohms
Moving vehicles
Opposes any change in the current flowing in a circuit

33. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
The direction the negative charge moves
Purging
Gauge number

34. What is the unit of measurement of electrical current?
Amperes
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)
Fixed - Electrolytic - Variable(all of the above)
Resistance increases as the conductor length increases

35. The generator is what method of creating potential energy?
Electromagnetism
Breakdown voltage
Common - not rechargable - gradually discharges when in storage(All of the above)
12 volts

36. What is a DC circuit characteristic?
Heat
Current flows in one direction - potential differences across a load does not change(Both A and B)
Opposes any change in the current flowing in a circuit
By their covering

37. What does Ohm's Law represent?
Bare - covered - insulated - stranded - cable(All of the above)
Series circuit
Relationship between current and potential difference
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

38. Which of the following materials is NOT a good conductor?
Choke
Porcelain
Silver
Moving vehicles

39. What is a common measure of wire diameter?
DC current
Serial
Gauge number
Composition of the resistor

40. What wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
How much potential difference can a material withstand before breaking down
Heat

41. What does static electricity do?
Does not move
Purging
Current flows in one direction - potential differences across a load does not change(Both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

42. What is the term for two or more cells attached together?
Battery
How much potential difference can a material withstand before breaking down
Heat
Symbol

43. What is voltage?
Insulation resistance
Fixed - Electrolytic - Variable(all of the above)
Heat
A difference in potential energy

44. What does an object have if a magnetic field acts on it?
15 -000 ohms - 20%
Magnetic properties
Relay
Potential difference

45. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
First digit is 9
Common - not rechargable - gradually discharges when in storage(All of the above)
Current change in a coil creates a magnetic change

46. What is the purpose of resistors in electrical circuits?
First digit
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Cell
Produce heat - light - or limit current to control it(all of the above)

47. What is power?
Does not move
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Volts
The rate of doing work

48. What does resistance produce?
Heat
1/1000th of an inch
Purging
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

49. What is resistance in electrical terms?
Opposition to electrical current
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Cables
Composition of the resistor

50. What is a switch that operates by electricity?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
The direction the negative charge moves
Serial
Relay