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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 do transducers do in electrical terms?
Solenoid and Relay(both A and B)
Composition of the resistor
Use an effect to produce another effect
Current flows in one direction - potential differences across a load does not change(Both A and B)

2. What can permanently break down a capacitor?
Electromagnetism
First digit is 9
Opposition to electrical current
Breakdown voltage

3. What makes electrons flow?
Fixed - Electrolytic - Variable(all of the above)
Potential difference
Symbol
Resistance increases as the conductor length increases

4. What type of circuit has two or more paths for current to follow?
The relationship of potential difference to current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Stranded
Parallel circuit

5. What are the names of two of the six primary methods of producing a voltage?
Voltage
Cells can be connected together to make a battery
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

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

7. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Produce heat - light - or limit current to control it(all of the above)
Current flows in one direction - potential differences across a load does not change(Both A and B)
Mutual induction

8. How is the heat production measured in a resistor?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Two
Potential difference
Potential difference - E*I - current times current change from point to point(all of the above)

9. What does a moving charge produce?
75 Ohms
A magnetic field
Electromagnetism
Fixed - Electrolytic - Variable(all of the above)

10. What do junction boxes protect?
Resistance increases as the conductor length increases
20%
Produce heat - light - or limit current to control it(all of the above)
Wire splices

11. What cannot be transformed to higher or lower potential differences?
DC flows continuously in one direction and AC potential difference and current both change direction
DC current
12 volts
Magnetic properties

12. What does static electricity do?
Does not move
The direction of the magnetic field
Amperes
Relay

13. What results when current is run through a material with high resistance?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Heat and current control(both a and c)
Parallel
How much potential difference can a material withstand before breaking down

14. What does a transformer transform?
Insulation resistance
Potential difference - E*I - current times current change from point to point(all of the above)
The relationship of potential difference to current
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

15. What is the term for doing work at the rate of joule per second?
Serial
1 watt
Silver
DC current

16. What is a DC circuit characteristic?
Ohms
Secondary cell
Current flows in one direction - potential differences across a load does not change(Both A and B)
American wire gauge(AWG)

17. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
First digit
Alternating current
Stranded
50 Ohms

18. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
American wire gauge(AWG)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
High resistance
10%

19. 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
75 Ohms
Stores electrical charge
12 volts
Voltage

20. What type of circuit has one path of follow through a load?
Strength of the charge
Series circuit
Start with the band on the end and read to the center
Opposition to movement of free electrons

21. What is the relationship of conductor size and length to resistance?
Strength of the charge
Heat
Amperes
Resistance increases as the conductor length increases

22. What is induction?
Start with the band on the end and read to the center
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Current change in a coil creates a magnetic change
Produce heat - light - or limit current to control it(all of the above)

23. Identify the blueprint symbol for capacitors.
Symbol
Breakdown voltage
Plastic - Rubber - Friction(all of the above)
Resistance value can not be changed

24. What is dielectric strength?
Plastic - Rubber - Friction(all of the above)
Secondary cell
Current change in a coil creates a magnetic change
How much potential difference can a material withstand before breaking down

25. What is voltage?
A difference in potential energy
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Parallel circuit
Serial

26. What is power?
The rate of doing work
Grounding wire
Current flows in one direction - potential differences across a load does not change(Both A and B)
Purging

27. What must be large enough to carry the largest current likely to occur?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Opposition to electrical current
Grounding wire
How much potential difference can a material withstand before breaking down

28. Which of the following materials is NOT a good conductor?
10
Secondary cell
Porcelain
Choke

29. A resistor is color coded brown - green - orange. What is its resistance?
Porcelain
Composition of the resistor
15 -000 ohms - 20%
Potential difference

30. What is a way to classify wires and cables?
By their covering
Solenoid and Relay(both A and B)
Opposition to electrical current
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)

31. What makes electrons flow?
Potential difference
Circular and square mills(Both A and B)
Stores electrical charge
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

32. How do you read resistor color codes?
Start with the band on the end and read to the center
Ohms
Area and spacing of capacitor - static current in the capacitor(both A and B)
Amperes

33. What is capacitance in electrical terms?
Ability to store an electric charge
Area and spacing of capacitor - static current in the capacitor(both A and B)
Resistance value can not be changed
Bare - covered - insulated - stranded - cable(All of the above)

34. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Bonding and grounding
Silver
Parallel circuit

35. 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)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
DC current
Heat and current control(both a and c)

36. What is the measure of potential difference?
Volts
75 Ohms
Stores electrical charge
Two

37. What is the purpose of a raceway?
Symbol
Alternating current
5%
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

38. What is the unit of measurement of potential difference?
Volts
Potential difference
Ohms
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

39. What is a switch that operates by electricity?
Plastic - Rubber - Friction(all of the above)
Cell
Relay
Electrical resistance against the flow of current

40. What is the unit of measurement of electrical current?
Amperes
Two
20%
Does not move

41. What does an object have if a magnetic field acts on it?
Battery
Tolerence
Magnetic properties
A difference in potential energy

42. How many kinds of poles do magnets have?
Two
Voltmeter
Volts
The rate of doing work

43. What is a characteristic of a fixed resistor?
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)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
The direction the negative charge moves
Resistance value can not be changed

44. 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
From the negative battery terminal to the positive terminal
Parallel
Silver
12 volts

45. Which type of cell can be recharged?
Electromagnetic field
Porcelain
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)
Secondary cell

46. What is true about a dry cell?
1/1000th of an inch
Amperes
Battery
Common - not rechargable - gradually discharges when in storage(All of the above)

47. When does a DC circuit oppose current flow?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Ability to store an electric charge
Resistance increases as the conductor length increases
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

48. What is needed for electric heating elements and the filaments of light bulbs?
Gauge number
First digit is 9
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
High resistance

49. Which material has the lowest resistance at ordinary temperatures?
Purging
Wire splices
Tolerence
Silver

50. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
1/1000th of an inch
Volts
75 Ohms
5%