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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?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Electrical resistance against the flow of current
Use an effect to produce another effect
Fixed - tapped - variable(all of the above)

2. What is needed for electric heating elements and the filaments of light bulbs?
Relationship between current and potential difference
Parallel
Wire splices
High resistance

3. What can permanently break down a capacitor?
Cells can be connected together to make a battery
Breakdown voltage
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Produce heat - light - or limit current to control it(all of the above)

4. What is a common measure of wire diameter?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Parallel
Start with the band on the end and read to the center
Gauge number

5. What information do the Left-Hand Rules provide?
First digit
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Electrical resistance against the flow of current
Mutual induction

6. What wire measurement is commonly used in the U.S.?
High resistance
Gauge number
Secondary cell
American wire gauge(AWG)

7. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Strength of the charge
Solenoid and Relay(both A and B)
Alternating current
Stores electrical charge

8. What is a switch that operates by electricity?
Start with the band on the end and read to the center
Fixed - Electrolytic - Variable(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)
Relay

9. What is a characteristic of a fixed resistor?
Series circuit
Symbol
Resistance value can not be changed
Produce heat - light - or limit current to control it(all of the above)

10. What cannot be transformed to higher or lower potential differences?
Porcelain
Relationship between current and potential difference
DC current
Opposition to electrical current

11. What is the unit of measurement of electrical current?
Cables
Ability to store an electric charge
Amperes
Cell

12. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Amperes
Use an effect to produce another effect
5%
Opposition to electrical current

13. A resistor is color coded brown - green - orange. What is its resistance?
10
Composition of the resistor
Strength of the charge
15 -000 ohms - 20%

14. 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)
Grounding wire
10%
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

15. What type of circuit has one path of follow through a load?
20%
Voltmeter
1 watt
Series circuit

16. What determines whether a spark can be produced?
Electromagnetism
Symbol
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

17. The thermocouple uses which method for creating potential energy?
1/1000th of an inch
Heat
Two
DC flows continuously in one direction and AC potential difference and current both change direction

18. What is a property of inductors in electrical circuits?
Opposes any change in the current flowing in a circuit
Stores electrical charge
DC current
Cables

19. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Produce heat - light - or limit current to control it(all of the above)
1/1000th of an inch
Electromagnetic field

20. What do junction boxes protect?
A magnetic field
75 Ohms
Wire splices
Solenoid and Relay(both A and B)

21. What does a moving charge produce?
Grounding wire
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)
Composition of the resistor
A magnetic field

22. What does Ohm's Law represent?
Alternating current
Use an effect to produce another effect
Relationship between current and potential difference
Porcelain

23. What is an electromagnet?
Heat
Potential difference
1 watt
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

24. What is another name for an inductor?
Choke
Alternating current
Area and spacing of capacitor - static current in the capacitor(both A and B)
Purging

25. What do we call the ability to do work?
Heat
Use an effect to produce another effect
Volts
Energy

26. Identify the blueprint symbol for resistors.
Chemical action
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)
Parallel
--^V^V^V^---

27. What is dielectric strength?
Common - not rechargable - gradually discharges when in storage(All of the above)
Serial
How much potential difference can a material withstand before breaking down
Symbol

28. What is a way to classify wires and cables?
High resistance
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
By their covering
10%

29. What does a first band of white mean?
Opposition to electrical current
Bonding and grounding
First digit is 9
A magnetic field

30. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
Heat
Unlike poles attract
Electrical resistance against the flow of current

31. What is the use of the electromagnet?
Amperes
Composition of the resistor
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Potential difference

32. What is a conductor?
Grounding wire
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Current flows in one direction - potential differences across a load does not change(Both A and B)
1 watt

33. What is resistance?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction
Opposition to movement of free electrons
Resistance value can not be changed

34. What are the two generic methods to eliminate static electricity from metal objects?
Start with the band on the end and read to the center
Bonding and grounding
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)
Electrical resistance against the flow of current

35. Which way is the current going in the circuit shown?(electron flow)
First digit
20%
12 volts
From the negative battery terminal to the positive terminal

36. What types of protective tapes are used?
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)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
Plastic - Rubber - Friction(all of the above)

37. Identify the general blueprint symbol for inductors.
Grounding wire
Wire splices
Symbol
Alternating current

38. What is a wire classification?
12 volts
Serial
Use an effect to produce another effect
Bare - covered - insulated - stranded - cable(All of the above)

39. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Porcelain
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Voltage
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

40. What is the term for two or more cells attached together?
Battery
Bare - covered - insulated - stranded - cable(All of the above)
Symbol
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

41. What does a transformer transform?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
50 Ohms
The relationship of potential difference to current
Produce heat - light - or limit current to control it(all of the above)

42. What is the relationship of conductor size and length to resistance?
Fixed - tapped - variable(all of the above)
Secondary cell
Magnetic properties
Resistance increases as the conductor length increases

43. What is resistance in electrical terms?
Insulation resistance
Opposition to electrical current
Bonding and grounding
1/1000th of an inch

44. When reading resistance color codes - what does the first band indicate?
A magnetic field
First digit
Electromagnetic field
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

45. What is the purpose of resistors in electrical circuits?
Produce heat - light - or limit current to control it(all of the above)
Amperes
Parallel circuit
Area and spacing of capacitor - static current in the capacitor(both A and B)

46. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Fixed - tapped - variable(all of the above)
Silver
Current flows in one direction - potential differences across a load does not change(Both A and B)
50 Ohms

47. Why is the transformer important to AC electricity?

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48. What is the term for doing work at the rate of joule per second?
1 watt
Heat
From the negative battery terminal to the positive terminal
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

49. What determines the resistance of a resistor?
Composition of the resistor
Energy
Electrical resistance against the flow of current
Resistance value can not be changed

50. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
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)
Produce heat - light - or limit current to control it(all of the above)
Magnetic properties