Test your basic knowledge |

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 determines whether a spark can be produced?
Wire splices
Strength of the charge
12 volts
Amperes

2. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
The relationship of potential difference to current
Purging
From the negative battery terminal to the positive terminal

3. What is the term for two or more cells attached together?
How much potential difference can a material withstand before breaking down
A difference in potential energy
Voltmeter
Battery

4. What is the fundamental property of insulators?
10%
DC flows continuously in one direction and AC potential difference and current both change direction
Insulation resistance and Dielectric strength(Both A and B)
Ohms

5. How do you read resistor color codes?
The rate of doing work
Electromagnetism
Start with the band on the end and read to the center
Moving vehicles

6. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Current change in a coil creates a magnetic change
50 Ohms
Gauge number
Parallel

7. Where does the thumb point in both Left-Hand Rules?
Bare - covered - insulated - stranded - cable(All of the above)
The direction the negative charge moves
Gauge number
--^V^V^V^---

8. What can permanently break down a capacitor?
Chemical action
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)
Breakdown voltage
Stranded

9. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
Two
Heat
Resistance value can not be changed

10. What is the relationship between magnetism and electricity?
Chemical action
Parallel
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
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)

11. Identify the blueprint symbol for capacitors.
Potential difference - E*I - current times current change from point to point(all of the above)
Symbol
The relationship of potential difference to current
50 Ohms

12. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Breakdown voltage
Choke

13. In most applications - what remains constant if the current remains constant and flows in one direction?
Series circuit
Does not move
Electromagnetic field
--^V^V^V^---

14. When reading resistance color codes - what does the first band indicate?
Magnetic properties
Resistance increases as the conductor length increases
First digit
Serial

15. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Potential difference
Volts
20%
Cables

16. What is the term for doing work at the rate of joule per second?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
1 watt
Solenoid and Relay(both A and B)
Insulation resistance and Dielectric strength(Both A and B)

17. What is induction?
A magnetic field
Heat
Current change in a coil creates a magnetic change
Gauge number

18. What is true about a dry cell?
Energy
1 watt
Common - not rechargable - gradually discharges when in storage(All of the above)
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)

19. What is the relationship between cells and batteries?
Porcelain
12 volts
Cells can be connected together to make a battery
American wire gauge(AWG)

20. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
--^V^V^V^---
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
75 Ohms

21. How is capacitance determined?
Voltage
Grounding wire
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)

22. What is voltage?
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
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
A difference in potential energy

23. What makes electrons flow?
Heat and current control(both a and c)
Electrical resistance against the flow of current
Potential difference
Current flows in one direction - potential differences across a load does not change(Both A and B)

24. Which type of cell can be recharged?
Silver
Voltmeter
Cells can be connected together to make a battery
Secondary cell

25. What is the relationship of conductor size and length to resistance?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Resistance increases as the conductor length increases
Serial
5%

26. What determines the resistance of a resistor?
Opposes any change in the current flowing in a circuit
Heat
Porcelain
Composition of the resistor

27. The dry cell is what method for creating potential energy?
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
Composition of the resistor
Parallel circuit

28. What does a transformer transform?
10
Resistance value can not be changed
The relationship of potential difference to current
Produce heat - light - or limit current to control it(all of the above)

29. What is an arrangement of materials that create a potential difference by chemistry?
Volts
Produce heat - light - or limit current to control it(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Cell

30. What do we call the ability to do work?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Unlike poles attract
Energy
20%

31. What is the unit of measurement of electrical current?
Heat and current control(both a and c)
Amperes
Plastic - Rubber - Friction(all of the above)
--^V^V^V^---

32. What are the two generic methods to eliminate static electricity from metal objects?
How much potential difference can a material withstand before breaking down
Bonding and grounding
Use an effect to produce another effect
Stores electrical charge

33. What does an object have if a magnetic field acts on it?
Breakdown voltage
The rate of doing work
Symbol
Magnetic properties

34. How is the heat production measured in a resistor?
Two
Potential difference - E*I - current times current change from point to point(all of the above)
American wire gauge(AWG)
DC current

35. What is the measure of potential difference?
75 Ohms
Volts
Resistance increases as the conductor length increases
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

36. Which way is the current going in the circuit shown?(electron flow)
Cells can be connected together to make a battery
From the negative battery terminal to the positive terminal
15 -000 ohms - 20%
How much potential difference can a material withstand before breaking down

37. A resistor is color coded brown - green - orange. What is its resistance?
15 -000 ohms - 20%
Unlike poles attract
75 Ohms
5%

38. What is the type of cable composed of many fine wires?
Stranded
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(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)
Opposes any change in the current flowing in a circuit

39. What is a common measure of wire diameter?
Symbol
10%
Alternating current
Gauge number

40. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
Plastic - Rubber - Friction(all of the above)
1 watt
Stranded

41. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Purging
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
First digit is 9
Potential difference

42. What is the purpose of a raceway?
Stores electrical charge
Moving vehicles
Insulation resistance
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

43. 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
By their covering
Magnetic properties
75 Ohms
10%

44. What is insulation resistance?
Porcelain
Cells can be connected together to make a battery
Ohms
Electrical resistance against the flow of current

45. What is power?
Tolerence
Resistance increases as the conductor length increases
The rate of doing work
Opposition to electrical current

46. What is a property of inductors in electrical circuits?
Breakdown voltage
Opposes any change in the current flowing in a circuit
Electrical resistance against the flow of current
--^V^V^V^---

47. When does a DC circuit oppose current flow?
Common - not rechargable - gradually discharges when in storage(All of the above)
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Volts
DC flows continuously in one direction and AC potential difference and current both change direction

48. What is another name for an inductor?
Composition of the resistor
Choke
Parallel
--^V^V^V^---

49. What is the purpose of resistors in electrical circuits?
Voltmeter
Produce heat - light - or limit current to control it(all of the above)
--^V^V^V^---
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)

50. What does a moving charge produce?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Parallel circuit
75 Ohms
A magnetic field