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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. The dry cell is what method for creating potential energy?
A magnetic field
Chemical action
Does not move
Two

2. What is the measure of potential difference?
Parallel
Produce heat - light - or limit current to control it(all of the above)
Volts
Voltmeter

3. 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
Does not move
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)
75 Ohms

4. What is the relationship of conductor size and length to resistance?
Circular and square mills(Both A and B)
Does not move
Alternating current
Resistance increases as the conductor length increases

5. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Cells can be connected together to make a battery
Potential difference

6. The thermocouple uses which method for creating potential energy?
High resistance
The direction the negative charge moves
Cell
Heat

7. Identify the blueprint symbol for capacitors.
Symbol
Stranded
20%
Electromagnetic field

8. What is the purpose of resistors in electrical circuits?
Energy
Produce heat - light - or limit current to control it(all of the above)
Voltage
Heat

9. To what measurement do the conductor mills refer?
1/1000th of an inch
Potential difference
Cables
Parallel

10. What must be large enough to carry the largest current likely to occur?
Voltage
Grounding wire
Resistance value can not be changed
Breakdown voltage

11. What does a moving charge produce?
Common - not rechargable - gradually discharges when in storage(All of the above)
Start with the band on the end and read to the center
The relationship of potential difference to current
A magnetic field

12. Where does the thumb point in both Left-Hand Rules?
American wire gauge(AWG)
The direction the negative charge moves
Silver
How much potential difference can a material withstand before breaking down

13. What is insulation resistance?
Energy
Produce heat - light - or limit current to control it(all of the above)
Electrical resistance against the flow of current
The rate of doing work

14. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Breakdown voltage
First digit is 9
Use an effect to produce another effect

15. What determines whether a spark can be produced?
Resistance increases as the conductor length increases
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Strength of the charge
First digit

16. What is the unit of measurement of resistance?
Resistance increases as the conductor length increases
5%
A magnetic field
Ohms

17. The generator is what method of creating potential energy?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Ohms
Electromagnetism
Wire splices

18. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
1 watt
Solenoid and Relay(both A and B)
Mutual induction

19. What is resistance in electrical terms?
Opposition to electrical current
Relationship between current and potential difference
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Tolerence

20. What is resistance?
15 -000 ohms - 20%
1 watt
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Opposition to movement of free electrons

21. What makes electrons flow?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Moving vehicles
Battery
Potential difference

22. What information do the Left-Hand Rules provide?
Electromagnetism
American wire gauge(AWG)
Symbol
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

23. What is a type of mechanical transducer?
Volts
Moving vehicles
Solenoid and Relay(both A and B)
Stranded

24. What is the term for doing work at the rate of joule per second?
Bare - covered - insulated - stranded - cable(All of the above)
Relay
Area and spacing of capacitor - static current in the capacitor(both A and B)
1 watt

25. What is power?
1/1000th of an inch
Heat
The rate of doing work
Relay

26. What does a transformer transform?
Amperes
Resistance value can not be changed
The relationship of potential difference to current
Plastic - Rubber - Friction(all of the above)

27. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
75 Ohms
Energy
10%
A difference in potential energy

28. When reading resistance color codes - what does the first band indicate?
Relay
Fixed - Electrolytic - Variable(all of the above)
Symbol
First digit

29. What is the relationship between cells and batteries?
American wire gauge(AWG)
Cells can be connected together to make a battery
Plastic - Rubber - Friction(all of the above)
Two

30. What is dielectric strength?
Circular and square mills(Both A and B)
Potential difference
How much potential difference can a material withstand before breaking down
High resistance

31. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
By their covering
Serial
5%
Insulation resistance and Dielectric strength(Both A and B)

32. What is the unit of measurement of potential difference?
Opposes any change in the current flowing in a circuit
Volts
Cell
Relationship between current and potential difference

33. 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
How much potential difference can a material withstand before breaking down
12 volts
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Series circuit

34. When reading resistance color codes - what does the fourth band indicate?
Volts
Circular and square mills(Both A and B)
Tolerence
Grounding wire

35. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Heat and current control(both a and c)
Parallel
Serial
Potential difference

36. What results when current is run through a material with high resistance?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Alternating current
Solenoid and Relay(both A and B)
Heat and current control(both a and c)

37. Which type of cell can be recharged?
Purging
Grounding wire
Secondary cell
The rate of doing work

38. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Common - not rechargable - gradually discharges when in storage(All of the above)
Chemical action
Alternating current
Plastic - Rubber - Friction(all of the above)

39. What do junction boxes protect?
Potential difference - E*I - current times current change from point to point(all of the above)
From the negative battery terminal to the positive terminal
Wire splices
Choke

40. What cannot be transformed to higher or lower potential differences?
The direction the negative charge moves
DC current
Potential difference
DC flows continuously in one direction and AC potential difference and current both change direction

41. How do you read resistor color codes?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
Start with the band on the end and read to the center
How much potential difference can a material withstand before breaking down

42. Which of the following materials is NOT a good conductor?
1/1000th of an inch
Unlike poles attract
Porcelain
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

43. What are the names of two of the six primary methods of producing a voltage?
Voltage
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)
Plastic - Rubber - Friction(all of the above)

44. A resistor is color coded brown - green - orange. What is its resistance?
Battery
Stores electrical charge
Composition of the resistor
15 -000 ohms - 20%

45. What is a DC circuit characteristic?
Solenoid and Relay(both A and B)
Cell
Volts
Current flows in one direction - potential differences across a load does not change(Both A and B)

46. What is a common form used in conductors?
Electromagnetic field
Unlike poles attract
1 watt
Cables

47. What is a rigid metal conduit?
Resistance increases as the conductor length increases
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Two
10%

48. What is true about a dry cell?
Volts
Common - not rechargable - gradually discharges when in storage(All of the above)
Heat and current control(both a and c)
Use an effect to produce another effect

49. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
15 -000 ohms - 20%
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Parallel circuit

50. What is a switch that operates by electricity?
Ability to store an electric charge
Cables
Common - not rechargable - gradually discharges when in storage(All of the above)
Relay