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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 information do the Left-Hand Rules provide?
1/1000th of an inch
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
10

2. What are the two generic methods to eliminate static electricity from metal objects?
Parallel circuit
Alternating current
Bonding and grounding
Circular and square mills(Both A and B)

3. What do transducers do in electrical terms?
Use an effect to produce another effect
DC flows continuously in one direction and AC potential difference and current both change direction
75 Ohms
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

4. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Silver
Serial
50 Ohms
Plastic - Rubber - Friction(all of the above)

5. What is a common cause of static electricity in a shop?
Battery
From the negative battery terminal to the positive terminal
Moving vehicles
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

6. Identify the general blueprint symbol for inductors.
Opposes any change in the current flowing in a circuit
Symbol
--^V^V^V^---
Strength of the charge

7. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Current change in a coil creates a magnetic change
Purging
5%

8. Identify the blueprint symbol for resistors.
Potential difference - E*I - current times current change from point to point(all of the above)
Composition of the resistor
--^V^V^V^---
12 volts

9. What is a wire classification?
1/1000th of an inch
Cables
Bare - covered - insulated - stranded - cable(All of the above)
First digit is 9

10. To what measurement do the conductor mills refer?
Use an effect to produce another effect
1/1000th of an inch
Battery
12 volts

11. What does static electricity do?
Silver
Does not move
15 -000 ohms - 20%
Serial

12. What determines whether a spark can be produced?
Series circuit
Strength of the charge
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

13. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
--^V^V^V^---
Secondary cell
Insulation resistance

14. What is the measure of potential difference?
Magnetic properties
Volts
DC flows continuously in one direction and AC potential difference and current both change direction
Mutual induction

15. What can permanently break down a capacitor?
Two
Stores electrical charge
Breakdown voltage
Strength of the charge

16. What is the unit of measurement of electrical current?
Energy
Amperes
Series circuit
Grounding wire

17. What is insulation resistance?
Solenoid and Relay(both A and B)
Current change in a coil creates a magnetic change
Electrical resistance against the flow of current
Battery

18. What do we call the ability to do work?
Insulation resistance and Dielectric strength(Both A and B)
Moving vehicles
Energy
Chemical action

19. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Cables
Ohms
Voltmeter

20. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
Opposition to movement of free electrons
Mutual induction
Stores electrical charge

21. What is the purpose of capacitors in electrical circuits?
Opposition to electrical current
Parallel
Stores electrical charge
Porcelain

22. What is an electromagnet?
5%
By their covering
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Mutual induction

23. When does a DC circuit oppose current flow?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Electromagnetic field
A difference in potential energy
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

24. What is power?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
The rate of doing work
Produce heat - light - or limit current to control it(all of the above)
Potential difference

25. What is the term for doing work at the rate of joule per second?
Relationship between current and potential difference
Breakdown voltage
Volts
1 watt

26. What is resistance?
How much potential difference can a material withstand before breaking down
Series circuit
Opposition to movement of free electrons
Bare - covered - insulated - stranded - cable(All of the above)

27. What is the unit of measurement of potential difference?
15 -000 ohms - 20%
Volts
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
1 watt

28. What does an object have if a magnetic field acts on it?
Magnetic properties
Amperes
Purging
Bonding and grounding

29. What must be large enough to carry the largest current likely to occur?
12 volts
Fixed - tapped - variable(all of the above)
Grounding wire
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

30. A resistor is color coded brown - green - orange. What is its resistance?
The relationship of potential difference to current
Use an effect to produce another effect
15 -000 ohms - 20%
75 Ohms

31. What do electrical charges need to cause a fire or explosion?
Plastic - Rubber - Friction(all of the above)
Relationship between current and potential difference
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
The direction of the magnetic field

32. What is the use of the electromagnet?
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)
Symbol
Heat
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

33. Which way is the current going in the circuit shown?(electron flow)
Chemical action
Heat and current control(both a and c)
From the negative battery terminal to the positive terminal
A difference in potential energy

34. What is the basic law of magnetic force?
75 Ohms
Does not move
Unlike poles attract
Purging

35. Which of the following materials is NOT a good conductor?
Does not move
Porcelain
12 volts
DC flows continuously in one direction and AC potential difference and current both change direction

36. The generator is what method of creating potential energy?
Unlike poles attract
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Heat and current control(both a and c)
Electromagnetism

37. What does a moving charge produce?
Fixed - tapped - variable(all of the above)
A magnetic field
Opposition to movement of free electrons
1 watt

38. 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
Resistance value can not be changed
Potential difference
Volts
75 Ohms

39. When reading resistance color codes - what does the first band indicate?
Silver
First digit
The direction the negative charge moves
Does not move

40. What results when current is run through a material with high resistance?
--^V^V^V^---
Opposes any change in the current flowing in a circuit
Heat and current control(both a and c)
A difference in potential energy

41. Identify the blueprint symbol for capacitors.
By their covering
Symbol
Mutual induction
Relay

42. How is the heat production measured in a resistor?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Alternating current
Two
Potential difference - E*I - current times current change from point to point(all of the above)

43. What is capacitance in electrical terms?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Electromagnetic field
Ability to store an electric charge
Relationship between current and potential difference

44. What is a common form used in conductors?
Stores electrical charge
Battery
Relationship between current and potential difference
Cables

45. What is resistance in electrical terms?
75 Ohms
Opposition to electrical current
Symbol
50 Ohms

46. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
Common - not rechargable - gradually discharges when in storage(All of the above)
Voltmeter
Current flows in one direction - potential differences across a load does not change(Both A and B)

47. What is the relationship between magnetism and electricity?
A difference in potential energy
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
Voltage

48. How many kinds of poles do magnets have?
How much potential difference can a material withstand before breaking down
Two
1/1000th of an inch
Resistance value can not be changed

49. What does resistance produce?
Gauge number
Potential difference - E*I - current times current change from point to point(all of the above)
Heat
First digit

50. How do static charges distribute themselves?
Two
10
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Current change in a coil creates a magnetic change