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Basic Electricity

Instructions:

Answer 50 questions in 15 minutes.
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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 a sum of all the capacitors?
Use an effect to produce another effect
Parallel
Potential difference - E*I - current times current change from point to point(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

2. What is the unit of measurement of electrical current?
Produce heat - light - or limit current to control it(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
Heat and current control(both a and c)
Amperes

3. What is a wire classification?
Current change in a coil creates a magnetic change
12 volts
Bare - covered - insulated - stranded - cable(All of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

4. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
12 volts
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
50 Ohms
High resistance

5. What is a way to classify wires and cables?
5%
By their covering
Relay
Heat and current control(both a and c)

6. What does a transformer transform?
Ohms
Strength of the charge
1 watt
The relationship of potential difference to current

7. What is the relationship of conductor size and length to resistance?
Relationship between current and potential difference
Resistance increases as the conductor length increases
From the negative battery terminal to the positive terminal
Parallel circuit

8. How do you read resistor color codes?
Start with the band on the end and read to the center
Chemical action
A difference in potential energy
Current flows in one direction - potential differences across a load does not change(Both A and B)

9. How do static charges distribute themselves?
Bonding and grounding
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Magnetic properties
The direction of the magnetic field

10. What is a switch that operates by electricity?
Relay
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Tolerence
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

11. What is needed for electric heating elements and the filaments of light bulbs?
Amperes
Unlike poles attract
Purging
High resistance

12. What is capacitance in electrical terms?
Purging
Ability to store an electric charge
Series circuit
Grounding wire

13. What is the basic law of magnetic force?
The direction the negative charge moves
50 Ohms
Unlike poles attract
Circular and square mills(Both A and B)

14. Where does the thumb point in both Left-Hand Rules?
1/1000th of an inch
Use an effect to produce another effect
The direction the negative charge moves
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

15. What are the common units of measurement for round and square conductor cross - sections?
How much potential difference can a material withstand before breaking down
Circular and square mills(Both A and B)
Chemical action
Symbol

16. Which way is the current going in the circuit shown?(electron flow)
Volts
From the negative battery terminal to the positive terminal
Opposition to electrical current
First digit

17. What type of circuit has two or more paths for current to follow?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Parallel circuit
50 Ohms
Volts

18. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Opposes any change in the current flowing in a circuit
A magnetic field
Heat
10%

19. What is the unit of measurement of potential difference?
Heat
Volts
High resistance
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

20. What are the names of two of the six primary methods of producing a voltage?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Magnetic properties
Gauge number
15 -000 ohms - 20%

21. What are the two generic methods to eliminate static electricity from metal objects?
Relationship between current and potential difference
DC flows continuously in one direction and AC potential difference and current both change direction
Strength of the charge
Bonding and grounding

22. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Electromagnetic field
Series circuit
Ohms

23. What is another name for an inductor?
Choke
10%
Produce heat - light - or limit current to control it(all of the above)
Magnetic properties

24. What is a conductor?
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)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Serial
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

25. What is insulation resistance?
Breakdown voltage
Tolerence
The direction the negative charge moves
Electrical resistance against the flow of current

26. What does an object have if a magnetic field acts on it?
Potential difference - E*I - current times current change from point to point(all of the above)
Magnetic properties
Chemical action
Tolerence

27. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
High resistance
Breakdown voltage
The relationship of potential difference to current
Mutual induction

28. What is the type of cable composed of many fine wires?
Stranded
Volts
From the negative battery terminal to the positive terminal
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

29. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Heat and current control(both a and c)
Relationship between current and potential difference
5%
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

30. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
Heat and current control(both a and c)
Use an effect to produce another effect
12 volts

31. What does resistance produce?
Electromagnetism
Heat
12 volts
DC current

32. What information do the Left-Hand Rules provide?
Symbol
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Ohms

33. What does Ohm's Law represent?
Stranded
Choke
Relationship between current and potential difference
Tolerence

34. Identify the blueprint symbol for resistors.
Alternating current
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
--^V^V^V^---
Serial

35. What is a rigid metal conduit?
Cells can be connected together to make a battery
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
By their covering
Start with the band on the end and read to the center

36. What must be large enough to carry the largest current likely to occur?
Use an effect to produce another effect
75 Ohms
Choke
Grounding wire

37. What is the relationship between cells and batteries?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Plastic - Rubber - Friction(all of the above)
50 Ohms
Cells can be connected together to make a battery

38. What is a common form used in conductors?
Potential difference
Cables
Does not move
Current flows in one direction - potential differences across a load does not change(Both A and B)

39. What is the purpose of capacitors in electrical circuits?
Breakdown voltage
Purging
Insulation resistance and Dielectric strength(Both A and B)
Stores electrical charge

40. What is the relationship between magnetism and electricity?
Strength of the charge
75 Ohms
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)
Energy

41. What is the use of the electromagnet?
Series circuit
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
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

42. What is power?
Opposes any change in the current flowing in a circuit
75 Ohms
Purging
The rate of doing work

43. What is the measure of potential difference?
--^V^V^V^---
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)
Volts

44. Which of the following is a type of resistor?
Relationship between current and potential difference
Fixed - tapped - variable(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Stores electrical charge

45. Which material has the lowest resistance at ordinary temperatures?
--^V^V^V^---
Battery
Silver
Voltage

46. Identify the general blueprint symbol for inductors.
Two
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)
Symbol
How much potential difference can a material withstand before breaking down

47. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
A magnetic field
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
From the negative battery terminal to the positive terminal

48. The generator is what method of creating potential energy?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Electromagnetism
Cells can be connected together to make a battery
Ability to store an electric charge

49. What is the term for two or more cells attached together?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Energy
12 volts
Battery

50. What is voltage?
Opposition to electrical current
Volts
A difference in potential energy
--^V^V^V^---

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Basic Electricity

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