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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 term for two or more cells attached together?
Symbol
Heat
Tolerence
Battery

2. In most applications - what remains constant if the current remains constant and flows in one direction?
Cables
75 Ohms
Electromagnetic field
Strength of the charge

3. What is an arrangement of materials that create a potential difference by chemistry?
Use an effect to produce another effect
Cell
Current flows in one direction - potential differences across a load does not change(Both A and B)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

4. What does a moving charge produce?
Relationship between current and potential difference
A magnetic field
High resistance
Mutual induction

5. What is a type of mechanical transducer?
Relay
Solenoid and Relay(both A and B)
50 Ohms
Opposition to electrical current

6. Where does the thumb point in both Left-Hand Rules?
The direction the negative charge moves
American wire gauge(AWG)
The relationship of potential difference to 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)

7. What makes electrons flow?
Potential difference
50 Ohms
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Serial

8. What do junction boxes protect?
Wire splices
Resistance value can not be changed
Porcelain
15 -000 ohms - 20%

9. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
First digit
--^V^V^V^---
10
10%

10. What information do the Left-Hand Rules provide?
Produce heat - light - or limit current to control it(all of the above)
10
A difference in potential energy
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

11. What is voltage?
Cables
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
A difference in potential energy
Current flows in one direction - potential differences across a load does not change(Both A and B)

12. What must be large enough to carry the largest current likely to occur?
Fixed - tapped - variable(all of the above)
Grounding wire
Use an effect to produce another effect
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

13. What type of circuit has two or more paths for current to follow?
Parallel circuit
Resistance increases as the conductor length increases
12 volts
Stranded

14. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Heat
Unlike poles attract
Alternating current
Stores electrical charge

15. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
Gauge number
Potential difference - E*I - current times current change from point to point(all of the above)
Purging

16. What do transducers do in electrical terms?
Strength of the charge
Use an effect to produce another effect
Cables
Series circuit

17. What is the name for electrical resistance of insulation?
Symbol
Opposition to movement of free electrons
Volts
Insulation resistance

18. What determines whether a spark can be produced?
Current change in a coil creates a magnetic change
Serial
Strength of the charge
High resistance

19. What does resistance produce?
Heat
DC current
Circular and square mills(Both A and B)
Start with the band on the end and read to the center

20. What is the term for doing work at the rate of joule per second?
First digit is 9
Stranded
Battery
1 watt

21. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
DC current
How much potential difference can a material withstand before breaking down
Voltage
Serial

22. What are the two generic methods to eliminate static electricity from metal objects?
Cell
Bonding and grounding
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Voltmeter

23. What is the difference between AC and DC?
American wire gauge(AWG)
First digit is 9
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
DC flows continuously in one direction and AC potential difference and current both change direction

24. What is the purpose of capacitors in electrical circuits?
12 volts
Stores electrical charge
From the negative battery terminal to the positive terminal
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

25. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
The relationship of potential difference to current
Symbol
Purging
Parallel circuit

26. What does an object have if a magnetic field acts on it?
Chemical action
Magnetic properties
Ohms
Voltmeter

27. What is a DC circuit characteristic?
Fixed - Electrolytic - Variable(all of the above)
Breakdown voltage
Battery
Current flows in one direction - potential differences across a load does not change(Both A and B)

28. What is a common form used in conductors?
Parallel circuit
Cables
Cells can be connected together to make a battery
Magnetic properties

29. What results when current is run through a material with high resistance?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Heat and current control(both a and c)
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)
Ability to store an electric charge

30. When does a DC circuit oppose current flow?
Series circuit
Cell
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

31. What does a first band of white mean?
Start with the band on the end and read to the center
First digit is 9
Heat
Ability to store an electric charge

32. How is the heat production measured in a resistor?
First digit is 9
First digit
Potential difference - E*I - current times current change from point to point(all of the above)
The direction the negative charge moves

33. What makes electrons flow?
Bare - covered - insulated - stranded - cable(All of the above)
--^V^V^V^---
American wire gauge(AWG)
Potential difference

34. What is insulation resistance?
Solenoid and Relay(both A and B)
Electrical resistance against the flow of current
Plastic - Rubber - Friction(all of the above)
Composition of the resistor

35. What is another name for an inductor?
Silver
Electromagnetic field
Moving vehicles
Choke

36. What determines the resistance of a resistor?
Circular and square mills(Both A and B)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Composition of the resistor
Stranded

37. What is the purpose of resistors in electrical circuits?
Plastic - Rubber - Friction(all of the above)
Produce heat - light - or limit current to control it(all of the above)
Resistance increases as the conductor length increases
Secondary cell

38. What do we call the ability to do work?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Current change in a coil creates a magnetic change
From the negative battery terminal to the positive terminal
Energy

39. What does Ohm's Law represent?
Cables
Serial
Moving vehicles
Relationship between current and potential difference

40. 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
Cables
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)
Unlike poles attract
75 Ohms

41. What is a type of capacitor?
Insulation resistance and Dielectric strength(Both A and B)
Fixed - Electrolytic - Variable(all of the above)
Grounding wire
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

42. How many kinds of poles do magnets have?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Two
Heat and current control(both a and c)
Grounding wire

43. 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
High resistance
12 volts
Start with the band on the end and read to the center
Fixed - tapped - variable(all of the above)

44. What are the names of two of the six primary methods of producing a voltage?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
1 watt
Series circuit

45. What is the fundamental property of insulators?
Ohms
Insulation resistance and Dielectric strength(Both A and B)
Common - not rechargable - gradually discharges when in storage(All of the above)
Symbol

46. What is dielectric strength?
Parallel
How much potential difference can a material withstand before breaking down
Use an effect to produce another effect
Tolerence

47. What wire measurement is commonly used in the U.S.?
Silver
DC flows continuously in one direction and AC potential difference and current both change direction
American wire gauge(AWG)
Symbol

48. What is power?
Volts
Potential difference
The rate of doing work
10%

49. What cannot be transformed to higher or lower potential differences?
DC current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Tolerence
Choke

50. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
50 Ohms
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Voltmeter