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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 a switch that operates by electricity?
Insulation resistance
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Relay
Gauge number

2. Which material has the lowest resistance at ordinary temperatures?
Plastic - Rubber - Friction(all of the above)
Insulation resistance and Dielectric strength(Both A and B)
Silver
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)

3. What is voltage?
A difference in potential energy
Does not move
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Electrical resistance against the flow of current

4. Identify the blueprint symbol for capacitors.
Potential difference
75 Ohms
Symbol
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

5. 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
Purging
75 Ohms
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)
Volts

6. What is the unit of measurement of electrical current?
Amperes
The relationship of potential difference to current
Purging
--^V^V^V^---

7. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
1 watt
Common - not rechargable - gradually discharges when in storage(All of the above)
Purging
Parallel

8. What do we call the ability to do work?
Energy
First digit
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Resistance value can not be changed

9. What is the difference between AC and DC?
Bonding and grounding
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
Alternating current

10. The generator is what method of creating potential energy?
Does not move
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Electromagnetism
Breakdown voltage

11. How is capacitance determined?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
First digit is 9
Opposition to electrical current
Area and spacing of capacitor - static current in the capacitor(both A and B)

12. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Stranded
Heat
Amperes

13. Which type of cell can be recharged?
20%
Mutual induction
Secondary cell
1/1000th of an inch

14. What is the term for doing work at the rate of joule per second?
Purging
1 watt
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)
Cells can be connected together to make a battery

15. What is a common cause of static electricity in a shop?
The relationship of potential difference to current
Symbol
American wire gauge(AWG)
Moving vehicles

16. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
Plastic - Rubber - Friction(all of the above)
75 Ohms
Electrical resistance against the flow of current

17. What is resistance?
Opposition to electrical current
Opposition to movement of free electrons
Stores electrical charge
Moving vehicles

18. Where do the fingers point in both Left-Hand Rules?
Energy
5%
Silver
The direction of the magnetic field

19. How is the heat production measured in a resistor?
Voltmeter
Insulation resistance
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)

20. What is a property of inductors in electrical circuits?
DC current
American wire gauge(AWG)
Opposes any change in the current flowing in a circuit
Electromagnetism

21. What makes electrons flow?
Potential difference
Common - not rechargable - gradually discharges when in storage(All of the above)
Electrical resistance against the flow of current
Does not move

22. What is a common measure of wire diameter?
Stores electrical charge
Grounding wire
Gauge number
Alternating current

23. What is resistance in electrical terms?
The relationship of potential difference to current
Opposition to electrical current
Heat and current control(both a and c)
Symbol

24. What does resistance produce?
Grounding wire
Heat
Volts
--^V^V^V^---

25. How do you read resistor color codes?
Cables
DC current
Start with the band on the end and read to the center
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)

26. What cannot be transformed to higher or lower potential differences?
Gauge number
DC current
Ohms
Mutual induction

27. What must be large enough to carry the largest current likely to occur?
Ohms
Serial
Grounding wire
Stranded

28. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
Choke
Opposition to movement of free electrons
Use an effect to produce another effect

29. What is the term for two or more cells attached together?
12 volts
A difference in potential energy
Battery
Tolerence

30. What do junction boxes protect?
Composition of the resistor
Volts
Two
Wire splices

31. What is the relationship between magnetism and electricity?
10
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)
Relationship between current and potential difference
Symbol

32. What are the names of two of the six primary methods of producing a voltage?
By their covering
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Battery
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

33. What is another name for an inductor?
Choke
Serial
Magnetic properties
20%

34. To what measurement do the conductor mills refer?
Composition of the resistor
Use an effect to produce another effect
Resistance value can not be changed
1/1000th of an inch

35. What are the common units of measurement for round and square conductor cross - sections?
Circular and square mills(Both A and B)
10
Stranded
Solenoid and Relay(both A and B)

36. A resistor is color coded brown - green - orange. What is its resistance?
12 volts
15 -000 ohms - 20%
Secondary cell
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

37. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
First digit
High resistance
Wire splices

38. What does an object have if a magnetic field acts on it?
Magnetic properties
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Opposition to movement of free electrons

39. Which of the following is a type of resistor?
From the negative battery terminal to the positive terminal
Strength of the charge
Fixed - tapped - variable(all of the above)
DC flows continuously in one direction and AC potential difference and current both change direction

40. What does a moving charge produce?
Battery
DC flows continuously in one direction and AC potential difference and current both change direction
A magnetic field
Secondary cell

41. What do electrical charges need to cause a fire or explosion?
DC flows continuously in one direction and AC potential difference and current both change direction
Parallel
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
By their covering

42. What is the type of cable composed of many fine wires?
Use an effect to produce another effect
DC current
Stranded
Symbol

43. What instrument measures voltage?
Potential difference
Voltmeter
5%
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

44. What is a common form used in conductors?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
From the negative battery terminal to the positive terminal
Secondary cell
Cables

45. What is an arrangement of materials that create a potential difference by chemistry?
Cell
First digit is 9
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Voltmeter

46. Identify the general blueprint symbol for inductors.
5%
Serial
Symbol
Parallel circuit

47. When does a DC circuit oppose current flow?
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)
Cells can be connected together to make a battery
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Strength of the charge

48. When reading resistance color codes - what does the first band indicate?
Composition of the resistor
First digit
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Wire splices

49. What does Ohm's Law represent?
Porcelain
5%
Resistance value can not be changed
Relationship between current and potential difference

50. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Electrical resistance against the flow of current
Fixed - Electrolytic - Variable(all of the above)
Serial