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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 the measure of potential difference?
Series circuit
Volts
The relationship of potential difference to current
By their covering

2. The thermocouple uses which method for creating potential energy?
Heat
Cables
Cell
Does not move

3. Identify the blueprint symbol for resistors.
By their covering
--^V^V^V^---
Insulation resistance
Tolerence

4. Which material has the lowest resistance at ordinary temperatures?
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)
Moving vehicles
The relationship of potential difference to current
Silver

5. What is a way to classify wires and cables?
By their covering
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
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)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

6. Which of the following materials is NOT a good conductor?
Opposition to electrical current
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
First digit
Porcelain

7. Which of the following is a type of resistor?
Electromagnetism
Common - not rechargable - gradually discharges when in storage(All of the above)
Fixed - tapped - variable(all of the above)
75 Ohms

8. Identify the blueprint symbol for capacitors.
Current flows in one direction - potential differences across a load does not change(Both A and B)
Series circuit
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Symbol

9. What is the purpose of a raceway?
Serial
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Secondary cell
DC current

10. What is resistance in electrical terms?
Heat
Gauge number
Opposition to electrical current
Symbol

11. What is the basic law of magnetic force?
Unlike poles attract
Electrical resistance against the flow of current
Resistance increases as the conductor length increases
From the negative battery terminal to the positive terminal

12. What is a switch that operates by electricity?
Bonding and grounding
Relay
Heat and current control(both a and c)
Electromagnetic field

13. What is a property of inductors in electrical circuits?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
10
Opposes any change in the current flowing in a circuit
Grounding wire

14. When reading resistance color codes - what does the first band indicate?
Magnetic properties
Area and spacing of capacitor - static current in the capacitor(both A and B)
First digit
Grounding wire

15. What do electrical charges need to cause a fire or explosion?
Symbol
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(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)
Ohms

16. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
The relationship of potential difference to current
A difference in potential energy
American wire gauge(AWG)

17. Where does the thumb point in both Left-Hand Rules?
Bonding and grounding
Opposition to movement of free electrons
Heat
The direction the negative charge moves

18. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
DC flows continuously in one direction and AC potential difference and current both change direction
Grounding wire
Parallel

19. What is a common form used in conductors?
Opposition to electrical current
Cables
Heat and current control(both a and c)
The rate of doing work

20. 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)
The relationship of potential difference to current
Serial
Volts

21. What is the purpose of capacitors in electrical circuits?
Amperes
Stores electrical charge
1/1000th of an inch
Gauge number

22. What do we call the ability to do work?
Ability to store an electric charge
DC flows continuously in one direction and AC potential difference and current both change direction
Electromagnetism
Energy

23. What do transducers do in electrical terms?
Plastic - Rubber - Friction(all of the above)
Volts
Use an effect to produce another effect
Stranded

24. What cannot be transformed to higher or lower potential differences?
DC current
First digit is 9
Resistance value can not be changed
Electromagnetic field

25. What is the type of cable composed of many fine wires?
Breakdown voltage
Stranded
Series circuit
Silver

26. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Grounding wire
50 Ohms
Chemical action
Voltmeter

27. 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
Ability to store an electric charge
Resistance increases as the conductor length increases
Volts
12 volts

28. What is the relationship between cells and batteries?
Circular and square mills(Both A and B)
Cells can be connected together to make a battery
Symbol
Energy

29. When does a DC circuit oppose current flow?
Strength of the charge
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Volts
Cells can be connected together to make a battery

30. What does static electricity do?
Does not move
Ability to store an electric charge
Alternating current
By their covering

31. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Ability to store an electric charge
Solenoid and Relay(both A and B)
Voltage
Electrical resistance against the flow of current

32. Which type of cell can be recharged?
Secondary cell
Potential difference - E*I - current times current change from point to point(all of the above)
Stores electrical charge
Common - not rechargable - gradually discharges when in storage(All of the above)

33. What information do the Left-Hand Rules provide?
American wire gauge(AWG)
DC flows continuously in one direction and AC potential difference and current both change direction
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)

34. What does a transformer transform?
Amperes
The relationship of potential difference to current
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Fixed - Electrolytic - Variable(all of the above)

35. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
A difference in potential energy
Battery

36. What are the two generic methods to eliminate static electricity from metal objects?
Moving vehicles
20%
DC flows continuously in one direction and AC potential difference and current both change direction
Bonding and grounding

37. What does a third band of brown mean?
From the negative battery terminal to the positive terminal
Purging
Relationship between current and potential difference
10

38. How is capacitance determined?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Silver
First digit
5%

39. What type of circuit has one path of follow through a load?
Stranded
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Cables
Series circuit

40. What does a first band of white mean?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
First digit is 9
Parallel
Insulation resistance and Dielectric strength(Both A and B)

41. Identify the general blueprint symbol for inductors.
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Start with the band on the end and read to the center
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Symbol

42. 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
Solenoid and Relay(both A and B)
Opposes any change in the current flowing in a circuit
75 Ohms
Bare - covered - insulated - stranded - cable(All of the above)

43. What determines whether a spark can be produced?
The direction the negative charge moves
Strength of the charge
Grounding wire
Use an effect to produce another effect

44. The generator is what method of creating potential energy?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)
Electromagnetism
Breakdown voltage

45. What is the unit of measurement of potential difference?
Voltage
Volts
Voltmeter
Gauge number

46. What is insulation resistance?
Electrical resistance against the flow of current
The relationship of potential difference to current
Common - not rechargable - gradually discharges when in storage(All of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

47. What are the names of two of the six primary methods of producing a voltage?
Symbol
Wire splices
Opposition to electrical current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

48. What is a wire classification?
How much potential difference can a material withstand before breaking down
Use an effect to produce another effect
Bare - covered - insulated - stranded - cable(All of the above)
Symbol

49. What is a characteristic of insulators?
Cells can be connected together to make a battery
Serial
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
DC flows continuously in one direction and AC potential difference and current both change direction

50. What is an electromagnet?
Volts
Series circuit
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Fixed - Electrolytic - Variable(all of the above)