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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 thermocouple uses which method for creating potential energy?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
A magnetic field
Heat
A difference in potential energy

2. What must be large enough to carry the largest current likely to occur?
Does not move
Grounding wire
Fixed - tapped - variable(all of the above)
Chemical action

3. What does a moving charge produce?
A magnetic field
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)
Battery
Common - not rechargable - gradually discharges when in storage(All of the above)

4. Which type of cell can be recharged?
1 watt
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)
Volts
Secondary cell

5. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Circular and square mills(Both A and B)
Fixed - tapped - variable(all of the above)
Chemical action

6. What is a conductor?
Bare - covered - insulated - stranded - cable(All of the above)
Resistance value can not be changed
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
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 is a common form used in conductors?
Ability to store an electric charge
By their covering
75 Ohms
Cables

8. Where do the fingers point in both Left-Hand Rules?
Opposes any change in the current flowing in a circuit
Stranded
The direction of the magnetic field
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

9. What is another name for an inductor?
Choke
Use an effect to produce another effect
First digit
Strength of the charge

10. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Potential difference
5%
The rate of doing work
Electrical resistance against the flow of current

11. Identify the general blueprint symbol for inductors.
Two
Ability to store an electric charge
High resistance
Symbol

12. What does a third band of brown mean?
Stranded
10
Plastic - Rubber - Friction(all of the above)
First digit

13. The generator is what method of creating potential energy?
A difference in potential energy
Composition of the resistor
75 Ohms
Electromagnetism

14. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
Opposition to movement of free electrons
Strength of the charge
American wire gauge(AWG)

15. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
--^V^V^V^---
12 volts
Mutual induction

16. What is the name for electrical resistance of insulation?
75 Ohms
Insulation resistance
Heat and current control(both a and c)
Electromagnetic field

17. What cannot be transformed to higher or lower potential differences?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Amperes
Voltmeter
DC current

18. What are the common units of measurement for round and square conductor cross - sections?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
The direction the negative charge moves
Breakdown voltage
Circular and square mills(Both A and B)

19. What is insulation resistance?
Use an effect to produce another effect
Serial
Composition of the resistor
Electrical resistance against the flow of current

20. What is induction?
The relationship of potential difference to current
Current change in a coil creates a magnetic change
From the negative battery terminal to the positive terminal
Circular and square mills(Both A and B)

21. What can permanently break down a capacitor?
By their covering
Breakdown voltage
50 Ohms
Volts

22. What type of circuit has one path of follow through a load?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Series circuit
Start with the band on the end and read to the center
The rate of doing work

23. What is resistance?
A difference in potential energy
Opposition to movement of free electrons
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Does not move

24. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Purging
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)
Electrical resistance against the flow of current

25. 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
The rate of doing work
Area and spacing of capacitor - static current in the capacitor(both A and B)
Unlike poles attract

26. What are the two generic methods to eliminate static electricity from metal objects?
Opposition to movement of free electrons
Bonding and grounding
15 -000 ohms - 20%
Unlike poles attract

27. In most applications - what remains constant if the current remains constant and flows in one direction?
Parallel
Serial
Opposition to movement of free electrons
Electromagnetic field

28. Identify the blueprint symbol for resistors.
From the negative battery terminal to the positive terminal
--^V^V^V^---
Voltmeter
1 watt

29. What is the term for doing work at the rate of joule per second?
Silver
The direction of the magnetic field
DC flows continuously in one direction and AC potential difference and current both change direction
1 watt

30. What is a type of capacitor?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Fixed - Electrolytic - Variable(all of the above)
The direction of the magnetic field
Serial

31. What is a switch that operates by electricity?
Grounding wire
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Relay

32. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Start with the band on the end and read to the center
Serial
Purging

33. What is voltage?
The direction the negative charge moves
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A difference in potential energy
Area and spacing of capacitor - static current in the capacitor(both A and B)

34. What makes electrons flow?
Potential difference
Electrical resistance against the flow of current
1 watt
10%

35. What is the unit of measurement of potential difference?
A difference in potential energy
By their covering
Volts
Does not move

36. What determines whether a spark can be produced?
Opposes any change in the current flowing in a 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)
Strength of the charge
Electrical resistance against the flow of current

37. What do we call the ability to do work?
Cells can be connected together to make a battery
Opposition to electrical current
Electromagnetism
Energy

38. What is resistance in electrical terms?
Cells can be connected together to make a battery
--^V^V^V^---
Opposition to electrical current
First digit

39. What makes electrons flow?
Potential difference
Silver
Symbol
5%

40. 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
Common - not rechargable - gradually discharges when in storage(All of the above)
12 volts
High resistance
Serial

41. What results when current is run through a material with high resistance?
Heat and current control(both a and c)
Silver
DC current
Alternating current

42. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
Fixed - Electrolytic - Variable(all of the above)
Symbol
Potential difference - E*I - current times current change from point to point(all of the above)

43. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Potential difference
Secondary cell
Does not move

44. What is the difference between AC and DC?
Purging
Does not move
DC flows continuously in one direction and AC potential difference and current both change direction
Tolerence

45. To what measurement do the conductor mills refer?
Battery
Strength of the charge
1/1000th of an inch
Choke

46. What does resistance produce?
Strength of the charge
Parallel circuit
Heat
Resistance value can not be changed

47. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Solenoid and Relay(both A and B)
Unlike poles attract
Parallel
A difference in potential energy

48. Where does the thumb point in both Left-Hand Rules?
Heat
1 watt
The direction the negative charge moves
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)

49. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
First digit
The direction the negative charge moves
15 -000 ohms - 20%

50. Which material has the lowest resistance at ordinary temperatures?
Battery
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Heat and current control(both a and c)
Silver