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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. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Strength of the charge
First digit is 9
20%
Stranded

2. What is a common measure of wire diameter?
Gauge number
Potential difference
The direction the negative charge moves
Volts

3. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Grounding wire
12 volts
Magnetic properties
Mutual induction

4. What is the unit of measurement of potential difference?
Strength of the charge
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Purging
Volts

5. Identify the general blueprint symbol for inductors.
Choke
Symbol
Heat
Ohms

6. What is an arrangement of materials that create a potential difference by chemistry?
Mutual induction
Battery
Breakdown voltage
Cell

7. What is the fundamental property of insulators?
Moving vehicles
Secondary cell
Insulation resistance and Dielectric strength(Both A and B)
A magnetic field

8. What is the unit of measurement of resistance?
Ohms
Insulation resistance
Two
Secondary cell

9. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Does not move
Voltage
Secondary cell
Breakdown voltage

10. 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
10%
Cell
12 volts
Magnetic properties

11. What do junction boxes protect?
How much potential difference can a material withstand before breaking down
Wire splices
Purging
Resistance value can not be changed

12. What must be large enough to carry the largest current likely to occur?
Stores electrical charge
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Grounding wire
Alternating current

13. What is a rigid metal conduit?
The direction the negative charge moves
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Heat
Use an effect to produce another effect

14. What do transducers do in electrical terms?
12 volts
10%
Use an effect to produce another effect
First digit is 9

15. What is another name for an inductor?
Voltage
Choke
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

16. 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
1/1000th of an inch
Start with the band on the end and read to the center
75 Ohms
Use an effect to produce another effect

17. What does static electricity do?
Does not move
Gauge number
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
A difference in potential energy

18. What is dielectric strength?
Secondary cell
Amperes
Bare - covered - insulated - stranded - cable(All of the above)
How much potential difference can a material withstand before breaking down

19. What is the term for two or more cells attached together?
75 Ohms
Bare - covered - insulated - stranded - cable(All of the above)
From the negative battery terminal to the positive terminal
Battery

20. What cannot be transformed to higher or lower potential differences?
10%
Potential difference - E*I - current times current change from point to point(all of the above)
DC current
1 watt

21. What is a way to classify wires and cables?
Symbol
Start with the band on the end and read to the center
Parallel circuit
By their covering

22. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Insulation resistance
Magnetic properties

23. What do electrical charges need to cause a fire or explosion?
From the negative battery terminal to the positive terminal
Gauge number
5%
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

24. How is the heat production measured in a resistor?
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)
Cell
Purging
Potential difference - E*I - current times current change from point to point(all of the above)

25. What is an electromagnet?
The rate of doing work
Produce heat - light - or limit current to control it(all of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

26. The generator is what method of creating potential energy?
Electromagnetism
Potential difference - E*I - current times current change from point to point(all of the above)
Silver
Resistance increases as the conductor length increases

27. Which material has the lowest resistance at ordinary temperatures?
Alternating current
Silver
15 -000 ohms - 20%
First digit is 9

28. When reading resistance color codes - what does the fourth band indicate?
Tolerence
20%
From the negative battery terminal to the positive terminal
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

29. What is the purpose of capacitors in electrical circuits?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
How much potential difference can a material withstand before breaking down
Stores electrical charge
5%

30. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
By their covering
Silver
--^V^V^V^---

31. What does Ohm's Law represent?
Moving vehicles
Composition of the resistor
Relationship between current and potential difference
From the negative battery terminal to the positive terminal

32. What is a type of capacitor?
Relationship between current and potential difference
Fixed - Electrolytic - Variable(all of the above)
Opposition to electrical current
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

33. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Ability to store an electric charge
Parallel circuit
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
10%

34. To what measurement do the conductor mills refer?
First digit is 9
Tolerence
1/1000th of an inch
Plastic - Rubber - Friction(all of the above)

35. What is the use of the electromagnet?
Symbol
First digit
Moving vehicles
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

36. What does resistance produce?
Parallel
Electromagnetic field
Heat
Relay

37. What is a wire classification?
Use an effect to produce another effect
Current change in a coil creates a magnetic change
Bare - covered - insulated - stranded - cable(All of the above)
Breakdown voltage

38. Which of the following is a type of resistor?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Fixed - tapped - variable(all of the above)
Volts
Energy

39. How do you read resistor color codes?
How much potential difference can a material withstand before breaking down
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Start with the band on the end and read to the center
First digit

40. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Current change in a coil creates a magnetic change
10
Common - not rechargable - gradually discharges when in storage(All of the above)
Parallel

41. What is the relationship between magnetism and electricity?
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)
Breakdown voltage
Two
Volts

42. Which way is the current going in the circuit shown?(electron flow)
Symbol
From the negative battery terminal to the positive terminal
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Alternating current

43. How is capacitance determined?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Resistance value can not be changed
Area and spacing of capacitor - static current in the capacitor(both A and B)
Bare - covered - insulated - stranded - cable(All of the above)

44. What is a DC circuit characteristic?
Relationship between current and potential difference
Plastic - Rubber - Friction(all of the above)
Current flows in one direction - potential differences across a load does not change(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)

45. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
10
Serial
20%

46. What is insulation resistance?
Alternating current
Amperes
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Electrical resistance against the flow of current

47. What is the unit of measurement of electrical current?
15 -000 ohms - 20%
Parallel
Amperes
Energy

48. What wire measurement is commonly used in the U.S.?
75 Ohms
American wire gauge(AWG)
Energy
Composition of the resistor

49. When reading resistance color codes - what does the first band indicate?
How much potential difference can a material withstand before breaking down
Breakdown voltage
15 -000 ohms - 20%
First digit

50. What information do the Left-Hand Rules provide?
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)
Plastic - Rubber - Friction(all of the above)
12 volts