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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 resistance in electrical terms?
Opposition to electrical current
15 -000 ohms - 20%
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Energy

2. What does a first band of white mean?
Amperes
Potential difference
First digit is 9
Opposition to electrical current

3. What do we call the ability to do work?
Relay
Energy
Plastic - Rubber - Friction(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)

4. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Cells can be connected together to make a battery
Alternating current
Series circuit
5%

5. In most applications - what remains constant if the current remains constant and flows in one direction?
Alternating current
Secondary cell
Electromagnetic field
The direction the negative charge moves

6. Which of the following materials is NOT a good conductor?
Secondary cell
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Porcelain
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)

7. What is the name for electrical resistance of insulation?
Stranded
Symbol
Potential difference
Insulation resistance

8. Which way is the current going in the circuit shown?(electron flow)
Ohms
Choke
From the negative battery terminal to the positive terminal
Gauge number

9. How is the heat production measured in a resistor?
Amperes
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)
Potential difference - E*I - current times current change from point to point(all of the above)
Gauge number

10. What do transducers do in electrical terms?
1 watt
Use an effect to produce another effect
Alternating current
Grounding wire

11. What is a common form used in conductors?
Cables
Potential difference
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Electrical resistance against the flow of current

12. What types of protective tapes are used?
Plastic - Rubber - Friction(all of the above)
Silver
A magnetic field
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

13. A resistor is color coded brown - green - orange. What is its resistance?
Mutual induction
Symbol
15 -000 ohms - 20%
Magnetic properties

14. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Fixed - tapped - variable(all of the above)
Cables

15. What is voltage?
First digit
Energy
A difference in potential energy
Potential difference

16. What is resistance?
Parallel circuit
Opposition to movement of free electrons
Resistance increases as the conductor length increases
Stranded

17. What is the basic law of magnetic force?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Unlike poles attract
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Volts

18. Where does the thumb point in both Left-Hand Rules?
Electromagnetism
50 Ohms
The direction the negative charge moves
--^V^V^V^---

19. To what measurement do the conductor mills refer?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
1/1000th of an inch
5%
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

20. The thermocouple uses which method for creating potential energy?
Choke
Insulation resistance
Strength of the charge
Heat

21. What is a common cause of static electricity in a shop?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Moving vehicles
Series circuit
A magnetic field

22. What can permanently break down a capacitor?
Heat
Composition of the resistor
Breakdown voltage
10%

23. What wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
From the negative battery terminal to the positive terminal
First digit is 9
Insulation resistance and Dielectric strength(Both A and B)

24. What makes electrons flow?
Potential difference
Common - not rechargable - gradually discharges when in storage(All of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
A magnetic field

25. What is dielectric strength?
How much potential difference can a material withstand before breaking down
Unlike poles attract
Strength of the charge
15 -000 ohms - 20%

26. 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
Area and spacing of capacitor - static current in the capacitor(both A and B)
Voltage
12 volts
Gauge number

27. Where do the fingers point in both Left-Hand Rules?
Volts
Relationship between current and potential difference
The direction of the magnetic field
--^V^V^V^---

28. What does resistance produce?
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)
Heat
Tolerence
Voltmeter

29. The generator is what method of creating potential energy?
Solenoid and Relay(both A and B)
Does not move
Electromagnetism
High resistance

30. What is the purpose of resistors in electrical circuits?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
50 Ohms
Chemical action
Produce heat - light - or limit current to control it(all of the above)

31. What type of circuit has one path of follow through a load?
Ohms
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Series circuit
Current flows in one direction - potential differences across a load does not change(Both A and B)

32. When reading resistance color codes - what does the fourth band indicate?
Common - not rechargable - gradually discharges when in storage(All of the above)
Tolerence
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Resistance value can not be changed

33. What determines whether a spark can be produced?
Solenoid and Relay(both A and B)
Strength of the charge
12 volts
Cells can be connected together to make a battery

34. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
10
Voltage
Solenoid and Relay(both A and B)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

35. Which of the following is a type of resistor?
1/1000th of an inch
Opposes any change in the current flowing in a circuit
Stranded
Fixed - tapped - variable(all of the above)

36. What does a transformer transform?
Area and spacing of capacitor - static current in the capacitor(both A and B)
The relationship of potential difference to current
Grounding wire
Stores electrical charge

37. What is the relationship of conductor size and length to resistance?
Potential difference
Does not move
Resistance increases as the conductor length increases
Battery

38. What does an object have if a magnetic field acts on it?
Stranded
Magnetic properties
Strength of the charge
Symbol

39. How do you read resistor color codes?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
From the negative battery terminal to the positive terminal
Start with the band on the end and read to the center
Current change in a coil creates a magnetic change

40. What is a DC circuit characteristic?
Current flows in one direction - potential differences across a load does not change(Both A and B)
10%
Area and spacing of capacitor - static current in the capacitor(both A and B)
Produce heat - light - or limit current to control it(all of the above)

41. What is the difference between AC and DC?
DC flows continuously in one direction and AC potential difference and current both change direction
Cables
The direction the negative charge moves
Two

42. What are the names of two of the six primary methods of producing a voltage?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
--^V^V^V^---
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

43. What is the type of cable composed of many fine wires?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Heat
Stranded
Energy

44. Identify the general blueprint symbol for inductors.
Common - not rechargable - gradually discharges when in storage(All of the above)
From the negative battery terminal to the positive terminal
Moving vehicles
Symbol

45. What is capacitance in electrical terms?
Parallel
Ability to store an electric charge
Fixed - Electrolytic - Variable(all of the above)
Stores electrical charge

46. What does Ohm's Law represent?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Relationship between current and potential difference
Solenoid and Relay(both A and B)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

47. What cannot be transformed to higher or lower potential differences?
The relationship of potential difference to current
DC current
Resistance value can not be changed
Fixed - tapped - variable(all of the above)

48. 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)
Insulation resistance and Dielectric strength(Both A and B)
Series circuit
Heat

49. What is induction?
Relay
Current change in a coil creates a magnetic change
Grounding wire
Plastic - Rubber - Friction(all of the above)

50. What is a way to classify wires and cables?
1 watt
Heat and current control(both a and c)
Breakdown voltage
By their covering