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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. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Parallel circuit
Porcelain
Parallel

2. Identify the blueprint symbol for resistors.
Solenoid and Relay(both A and B)
--^V^V^V^---
Stranded
Resistance value can not be changed

3. What wire measurement is commonly used in the U.S.?
A difference in potential energy
American wire gauge(AWG)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Opposition to movement of free electrons

4. What instrument measures voltage?
75 Ohms
Insulation resistance
Voltmeter
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)

5. What does an object have if a magnetic field acts on it?
Volts
Heat
Energy
Magnetic properties

6. What does static electricity do?
Does not move
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
High resistance
Heat

7. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
A magnetic field
15 -000 ohms - 20%
The relationship of potential difference to current

8. What is voltage?
5%
Relay
Ability to store an electric charge
A difference in potential energy

9. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
The relationship of potential difference to current
Wire splices
Alternating current
Grounding wire

10. What type of circuit has one path of follow through a load?
Chemical action
Tolerence
First digit
Series circuit

11. Why is the transformer important to AC electricity?

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12. What can permanently break down a capacitor?
Chemical action
Unlike poles attract
Breakdown voltage
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

13. In most applications - what remains constant if the current remains constant and flows in one direction?
Moving vehicles
Energy
Ability to store an electric charge
Electromagnetic field

14. The dry cell is what method for creating potential energy?
Chemical action
Symbol
--^V^V^V^---
20%

15. What do we call the ability to do work?
10%
Potential difference
Plastic - Rubber - Friction(all of the above)
Energy

16. 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
Opposition to electrical current
Area and spacing of capacitor - static current in the capacitor(both A and B)
75 Ohms
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

17. A resistor is color coded brown - green - orange. What is its resistance?
15 -000 ohms - 20%
Mutual induction
Fixed - Electrolytic - Variable(all of the above)
50 Ohms

18. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
1/1000th of an inch
Insulation resistance
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Mutual induction

19. What is the relationship between magnetism and electricity?
Potential difference
Cells can be connected together to make a battery
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)
Bonding and grounding

20. What is a way to classify wires and cables?
Battery
By their covering
Tolerence
The rate of doing work

21. What is the term for two or more cells attached together?
Battery
Symbol
Potential difference
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

22. What is a DC circuit characteristic?
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)
Current flows in one direction - potential differences across a load does not change(Both A and B)
Parallel

23. The thermocouple uses which method for creating potential energy?
10%
Breakdown voltage
How much potential difference can a material withstand before breaking down
Heat

24. What information do the Left-Hand Rules provide?
From the negative battery terminal to the positive terminal
Stores electrical charge
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)

25. What does Ohm's Law represent?
Cell
DC current
Relationship between current and potential difference
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

26. What must be large enough to carry the largest current likely to occur?
Silver
Grounding wire
20%
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

27. What is another name for an inductor?
Stores electrical charge
Common - not rechargable - gradually discharges when in storage(All of the above)
Choke
Opposition to movement of free electrons

28. Which type of cell can be recharged?
Secondary cell
The rate of doing work
Opposition to electrical current
1/1000th of an inch

29. What is a type of capacitor?
75 Ohms
Fixed - Electrolytic - Variable(all of the above)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
The direction the negative charge moves

30. What is an electromagnet?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Start with the band on the end and read to the center
Current flows in one direction - potential differences across a load does not change(Both A and B)

31. What is insulation resistance?
Relay
Solenoid and Relay(both A and B)
Silver
Electrical resistance against the flow of current

32. What does a moving charge produce?
Insulation resistance
Parallel
Cables
A magnetic field

33. Which material has the lowest resistance at ordinary temperatures?
Alternating current
Resistance value can not be changed
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)
Silver

34. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Serial
Voltmeter
Wire splices
10%

35. How is the heat production measured in a resistor?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Series circuit
Potential difference - E*I - current times current change from point to point(all of the above)

36. When reading resistance color codes - what does the fourth band indicate?
The rate of doing work
High resistance
Tolerence
Gauge number

37. What determines the resistance of a resistor?
Produce heat - light - or limit current to control it(all of the above)
10
Circular and square mills(Both A and B)
Composition of the resistor

38. What is the purpose of resistors in electrical circuits?
Composition of the resistor
Energy
Produce heat - light - or limit current to control it(all of the above)
A difference in potential energy

39. What is induction?
Current change in a coil creates a magnetic change
A difference in potential energy
Mutual induction
Tolerence

40. What is a characteristic of a fixed resistor?
Resistance value can not be changed
Series circuit
Symbol
Opposes any change in the current flowing in a circuit

41. What is the relationship between cells and batteries?
First digit
Serial
10
Cells can be connected together to make a battery

42. What determines whether a spark can be produced?
Heat and current control(both a and c)
Heat
Strength of the charge
75 Ohms

43. What are the names of two of the six primary methods of producing a voltage?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Strength of the charge

44. What is a characteristic of insulators?
Choke
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Two
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

45. The generator is what method of creating potential energy?
75 Ohms
How much potential difference can a material withstand before breaking down
Heat
Electromagnetism

46. What does a first band of white mean?
Produce heat - light - or limit current to control it(all of the above)
First digit is 9
A magnetic field
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

47. What type of circuit has two or more paths for current to follow?
--^V^V^V^---
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Parallel circuit
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

48. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Bare - covered - insulated - stranded - cable(All of the above)
Parallel circuit
20%
75 Ohms

49. What is a property of inductors in electrical circuits?
Ability to store an electric charge
Opposes any change in the current flowing in a circuit
Breakdown voltage
1 watt

50. What are the common units of measurement for round and square conductor cross - sections?
From the negative battery terminal to the positive terminal
Circular and square mills(Both A and B)
Common - not rechargable - gradually discharges when in storage(All of the above)
Cables