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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 measure of potential difference?
Volts
Cell
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Purging

2. What determines whether a spark can be produced?
Start with the band on the end and read to the center
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
American wire gauge(AWG)
Strength of the charge

3. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
Voltage
Energy
Heat and current control(both a and c)

4. What is a type of mechanical transducer?
The direction of the magnetic field
Solenoid and Relay(both A and B)
Stores electrical charge
5%

5. What can permanently break down a capacitor?
Heat and current control(both a and c)
Breakdown voltage
How much potential difference can a material withstand before breaking down
Purging

6. What cannot be transformed to higher or lower potential differences?
Voltage
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)
First digit is 9
DC current

7. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
Heat
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

8. Why is the transformer important to AC electricity?

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9. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
1/1000th of an inch
Voltage
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)

10. How do you read resistor color codes?
Start with the band on the end and read to the center
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Gauge number
DC flows continuously in one direction and AC potential difference and current both change direction

11. What is power?
Solenoid and Relay(both A and B)
Two
Breakdown voltage
The rate of doing work

12. How many kinds of poles do magnets have?
Volts
Chemical action
Potential difference
Two

13. What does static electricity do?
Electromagnetic field
Does not move
1 watt
Stranded

14. Which of the following materials is NOT a good conductor?
Mutual induction
Cell
Potential difference
Porcelain

15. When reading resistance color codes - what does the first band indicate?
Volts
First digit
Silver
The rate of doing work

16. When reading resistance color codes - what does the fourth band indicate?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Unlike poles attract
Stranded
Tolerence

17. Identify the blueprint symbol for resistors.
Grounding wire
--^V^V^V^---
Opposes any change in the current flowing in a circuit
First digit

18. What is the purpose of a raceway?
Plastic - Rubber - Friction(all of the above)
Breakdown voltage
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Alternating current

19. Identify the blueprint symbol for capacitors.
Two
Fixed - tapped - variable(all of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Symbol

20. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
12 volts
5%
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

21. What is a DC circuit characteristic?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Insulation resistance and Dielectric strength(Both A and B)
Gauge number
Amperes

22. What is a characteristic of a fixed resistor?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Alternating current
Silver
Resistance value can not be changed

23. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Opposition to electrical current
Symbol
Parallel circuit

24. What is a type of capacitor?
Parallel
Fixed - Electrolytic - Variable(all of the above)
Stranded
The rate of doing work

25. What does a first band of white mean?
Electrical resistance against the flow of current
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Wire splices
First digit is 9

26. What is a common measure of wire diameter?
Gauge number
Plastic - Rubber - Friction(all of the above)
American wire gauge(AWG)
Bare - covered - insulated - stranded - cable(All of the above)

27. What is the purpose of capacitors in electrical circuits?
Heat
50 Ohms
Moving vehicles
Stores electrical charge

28. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Opposition to electrical current
Battery
Voltmeter
10%

29. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Unlike poles attract
Resistance value can not be changed
Cells can be connected together to make a battery
Parallel

30. What is resistance?
Cables
Voltmeter
Opposition to movement of free electrons
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

31. What instrument measures voltage?
Voltmeter
20%
Plastic - Rubber - Friction(all of the above)
Use an effect to produce another effect

32. What is voltage?
Symbol
Current change in a coil creates a magnetic change
A difference in potential energy
Resistance value can not be changed

33. What is an electromagnet?
Chemical action
Resistance value can not be changed
Heat and current control(both a and c)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

34. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
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)
Electromagnetic field
Ohms

35. What do junction boxes protect?
Wire splices
A magnetic field
Heat
Composition of the resistor

36. What is a common cause of static electricity in a shop?
Symbol
The direction of the magnetic field
Two
Moving vehicles

37. What do transducers do in electrical terms?
1 watt
Use an effect to produce another effect
10%
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

38. 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)
10%
Opposes any change in the current flowing in a circuit
Insulation resistance

39. What is resistance in electrical terms?
Purging
Grounding wire
Opposition to electrical current
Fixed - tapped - variable(all of the above)

40. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Chemical action
Secondary cell
Serial
50 Ohms

41. How is the heat production measured in a resistor?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
20%
Heat and current control(both a and c)

42. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Produce heat - light - or limit current to control it(all of the above)
From the negative battery terminal to the positive terminal
20%
American wire gauge(AWG)

43. What is a property of inductors in electrical circuits?
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)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Two
Opposes any change in the current flowing in a circuit

44. What makes electrons flow?
Purging
Potential difference
The rate of doing work
Fixed - Electrolytic - Variable(all of the above)

45. The dry cell is what method for creating potential energy?
Ohms
Chemical action
Relationship between current and potential difference
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

46. What is the basic law of magnetic force?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Plastic - Rubber - Friction(all of the above)
Produce heat - light - or limit current to control it(all of the above)
Unlike poles attract

47. What is the relationship of conductor size and length to resistance?
Use an effect to produce another effect
Fixed - tapped - variable(all of the above)
High resistance
Resistance increases as the conductor length increases

48. What must be large enough to carry the largest current likely to occur?
The rate of doing work
Grounding wire
The direction the negative charge moves
Start with the band on the end and read to the center

49. What is insulation resistance?
Electrical resistance against the flow of current
Insulation resistance
Alternating current
Chemical action

50. What makes electrons flow?
Does not move
A difference in potential energy
Potential difference
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)