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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. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Current change in a coil creates a magnetic change
Mutual induction
Serial
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

2. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Ability to store an electric charge
The direction the negative charge moves
Purging
Area and spacing of capacitor - static current in the capacitor(both A and B)

3. 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 rate of doing work
First digit is 9
Fixed - tapped - variable(all of the above)

4. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
Relay
The relationship of potential difference to current
Two

5. Which type of cell can be recharged?
Volts
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
The direction of the magnetic field
Secondary cell

6. What is the fundamental property of insulators?
Circular and square mills(Both A and B)
Insulation resistance and Dielectric strength(Both A and B)
The direction of the magnetic field
Bare - covered - insulated - stranded - cable(All of the above)

7. The generator is what method of creating potential energy?
Mutual induction
Electromagnetism
Start with the band on the end and read to the center
Symbol

8. What is a way to classify wires and cables?
15 -000 ohms - 20%
Wire splices
By their covering
Volts

9. What is a DC circuit characteristic?
First digit is 9
High resistance
Current flows in one direction - potential differences across a load does not change(Both A and B)
Does not move

10. What determines whether a spark can be produced?
Strength of the charge
Purging
Two
10

11. What is a switch that operates by electricity?
10
How much potential difference can a material withstand before breaking down
Relay
A difference in potential energy

12. What is a common measure of wire diameter?
Gauge number
10
The direction the negative charge moves
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

13. What is a characteristic of a fixed resistor?
Insulation resistance
1 watt
Resistance value can not be changed
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

14. What does a third band of brown mean?
Electromagnetic field
Heat
10
Choke

15. What does a moving charge produce?
Symbol
A magnetic field
Alternating current
75 Ohms

16. Identify the general blueprint symbol for inductors.
Symbol
Wire splices
Heat and current control(both a and c)
Cell

17. What do electrical charges need to cause a fire or explosion?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Moving vehicles
15 -000 ohms - 20%
Ability to store an electric charge

18. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
Potential difference - E*I - current times current change from point to point(all of the above)
From the negative battery terminal to the positive terminal
Bonding and grounding

19. What determines the resistance of a resistor?
Purging
American wire gauge(AWG)
Composition of the resistor
Circular and square mills(Both A and B)

20. What is needed for electric heating elements and the filaments of light bulbs?
Potential difference - E*I - current times current change from point to point(all of the above)
High resistance
Heat and current control(both a and c)
75 Ohms

21. 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
Gauge number
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
75 Ohms

22. What is a type of mechanical transducer?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
By their covering
Porcelain
Solenoid and Relay(both A and B)

23. What is resistance?
Purging
Series circuit
Symbol
Opposition to movement of free electrons

24. What is a common form used in conductors?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
The direction of the magnetic field
Cables
Porcelain

25. What does Ohm's Law represent?
Mutual induction
Relationship between current and potential difference
12 volts
Amperes

26. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Alternating current
Use an effect to produce another effect
The relationship of potential difference to current
Common - not rechargable - gradually discharges when in storage(All of the above)

27. What is capacitance in electrical terms?
Electromagnetic field
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Ability to store an electric charge
Breakdown voltage

28. How do static charges distribute themselves?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Alternating current
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Voltage

29. What is the measure of potential difference?
Area and spacing of capacitor - static current in the capacitor(both A and B)
The direction of the magnetic field
Volts
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

30. What cannot be transformed to higher or lower potential differences?
DC current
DC flows continuously in one direction and AC potential difference and current both change direction
Insulation resistance and Dielectric strength(Both A and B)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

31. What is power?
The rate of doing work
Insulation resistance and Dielectric strength(Both A and B)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Opposition to electrical current

32. What instrument measures voltage?
12 volts
Start with the band on the end and read to the center
Heat
Voltmeter

33. What is the name for electrical resistance of insulation?
Moving vehicles
Insulation resistance
Current change in a coil creates a magnetic change
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

34. The dry cell is what method for creating potential energy?
Opposition to electrical current
Chemical action
Silver
Fixed - tapped - variable(all of the above)

35. What is the purpose of capacitors in electrical circuits?
High resistance
Two
Electromagnetic field
Stores electrical charge

36. What is insulation resistance?
The direction of the magnetic field
Potential difference
Electrical resistance against the flow of current
Magnetic properties

37. Why is the transformer important to AC electricity?

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38. What do transducers do in electrical terms?
Porcelain
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Use an effect to produce another effect
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

39. What are the two generic methods to eliminate static electricity from metal objects?
Battery
15 -000 ohms - 20%
Resistance value can not be changed
Bonding and grounding

40. What must be large enough to carry the largest current likely to occur?
Stores electrical charge
Potential difference
Grounding wire
Voltmeter

41. What is the unit of measurement of electrical current?
The direction of the magnetic field
Voltage
Opposition to movement of free electrons
Amperes

42. What are the common units of measurement for round and square conductor cross - sections?
Volts
75 Ohms
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Circular and square mills(Both A and B)

43. What is voltage?
Volts
A difference in potential energy
Produce heat - light - or limit current to control it(all of the above)
How much potential difference can a material withstand before breaking down

44. What makes electrons flow?
Wire splices
Potential difference
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
12 volts

45. What is a wire classification?
Electromagnetic field
Bare - covered - insulated - stranded - cable(All of the above)
Solenoid and Relay(both A and B)
Grounding wire

46. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Potential difference
Symbol
Electromagnetism

47. What does static electricity do?
5%
Does not move
--^V^V^V^---
1 watt

48. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
Symbol
Serial
Bonding and grounding

49. What is the use of the electromagnet?
Solenoid and Relay(both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Stranded
Secondary cell

50. What is an arrangement of materials that create a potential difference by chemistry?
DC current
Produce heat - light - or limit current to control it(all of the above)
Cell
A difference in potential energy