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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 types of protective tapes are used?
Composition of the resistor
Choke
Heat
Plastic - Rubber - Friction(all of the above)

2. What determines the resistance of a resistor?
Purging
Alternating current
Magnetic properties
Composition of the resistor

3. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
Amperes
Battery
Start with the band on the end and read to the center

4. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
Potential difference
Current flows in one direction - potential differences across a load does not change(Both A and B)
Potential difference - E*I - current times current change from point to point(all of the above)

5. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Parallel circuit
20%
Circular and square mills(Both A and B)
Potential difference

6. Identify the blueprint symbol for capacitors.
Use an effect to produce another effect
Resistance value can not be changed
Symbol
Potential difference

7. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Voltmeter
By their covering
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)
Serial

8. What wire measurement is commonly used in the U.S.?
Potential difference
Two
American wire gauge(AWG)
Breakdown voltage

9. What is the relationship between cells and batteries?
Potential difference - E*I - current times current change from point to point(all of the above)
Opposition to electrical current
Cells can be connected together to make a battery
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

10. What does a third band of brown mean?
From the negative battery terminal to the positive terminal
10
Current change in a coil creates a magnetic change
Stranded

11. What does a first band of white mean?
First digit is 9
American wire gauge(AWG)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Secondary cell

12. A resistor is color coded brown - green - orange. What is its resistance?
Serial
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)
15 -000 ohms - 20%
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

13. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Magnetic properties
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
10%
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

14. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Current flows in one direction - potential differences across a load does not change(Both A and B)
Secondary cell
Purging

15. What do transducers do in electrical terms?
Symbol
First digit
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)
Use an effect to produce another effect

16. Identify the blueprint symbol for resistors.
Parallel circuit
--^V^V^V^---
Cell
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

17. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
5%
Secondary cell
Purging

18. 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
12 volts
Symbol
Strength of the charge
Potential difference - E*I - current times current change from point to point(all of the above)

19. What is the purpose of resistors in electrical circuits?
Grounding wire
Opposes any change in the current flowing in a circuit
Alternating current
Produce heat - light - or limit current to control it(all of the above)

20. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
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)
Relay
1 watt

21. When reading resistance color codes - what does the first band indicate?
Heat
Insulation resistance
Current flows in one direction - potential differences across a load does not change(Both A and B)
First digit

22. What is a characteristic of insulators?
Bare - covered - insulated - stranded - cable(All of the above)
Alternating current
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

23. What instrument measures voltage?
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)
Magnetic properties
Secondary cell
Voltmeter

24. What is the basic law of magnetic force?
Composition of the resistor
Unlike poles attract
Symbol
Start with the band on the end and read to the center

25. What determines whether a spark can be produced?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Voltage
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Strength of the charge

26. What makes electrons flow?
Potential difference
Purging
Strength of the charge
Grounding wire

27. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
How much potential difference can a material withstand before breaking down
Series circuit
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)

28. The thermocouple uses which method for creating potential energy?
Heat
1/1000th of an inch
How much potential difference can a material withstand before breaking down
Choke

29. What can permanently break down a capacitor?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Breakdown voltage
Opposes any change in the current flowing in a circuit
Volts

30. How do static charges distribute themselves?
Plastic - Rubber - Friction(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Cell
American wire gauge(AWG)

31. What is voltage?
Potential difference
Ohms
A difference in potential energy
Voltage

32. How is the heat production measured in a resistor?
Potential difference - E*I - current times current change from point to point(all of the above)
Heat and current control(both a and c)
Ability to store an electric charge
By their covering

33. What is a DC circuit characteristic?
A difference in potential energy
Energy
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)
Current flows in one direction - potential differences across a load does not change(Both A and B)

34. What does static electricity do?
Ohms
Does not move
Relationship between current and potential difference
Tolerence

35. What does resistance produce?
Heat
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Cables
Resistance value can not be changed

36. What do electrical charges need to cause a fire or explosion?
Voltmeter
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Magnetic properties
Potential difference

37. What is a common form used in conductors?
Unlike poles attract
Parallel circuit
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Cables

38. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
American wire gauge(AWG)
Purging
Circular and square mills(Both A and B)
Alternating current

39. What is a type of capacitor?
5%
A difference in potential energy
Unlike poles attract
Fixed - Electrolytic - Variable(all of the above)

40. What is the unit of measurement of resistance?
Ohms
Opposes any change in the current flowing in a circuit
Volts
10

41. Which of the following is a type of resistor?
Use an effect to produce another effect
Fixed - tapped - variable(all of the above)
10%
Ohms

42. What are the names of two of the six primary methods of producing a voltage?
Start with the band on the end and read to the center
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)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Potential difference

43. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Cell
Bonding and grounding
Fixed - Electrolytic - Variable(all of the above)

44. The dry cell is what method for creating potential energy?
Opposition to movement of free electrons
The direction the negative charge moves
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Chemical action

45. What makes electrons flow?
Potential difference
Heat and current control(both a and c)
Use an effect to produce another effect
10%

46. Which of the following materials is NOT a good conductor?
DC current
Porcelain
Ability to store an electric charge
Silver

47. What are the two generic methods to eliminate static electricity from metal objects?
Heat and current control(both a and c)
Battery
Grounding wire
Bonding and grounding

48. How is capacitance determined?
Grounding wire
Insulation resistance
By their covering
Area and spacing of capacitor - static current in the capacitor(both A and B)

49. What is power?
Breakdown voltage
DC current
50 Ohms
The rate of doing work

50. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Wire splices
Potential difference