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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 characteristic of a fixed resistor?
Fixed - tapped - variable(all of the above)
By their covering
Resistance value can not be changed
Fixed - Electrolytic - Variable(all of the above)

2. What types of protective tapes are used?
Serial
DC flows continuously in one direction and AC potential difference and current both change direction
Plastic - Rubber - Friction(all of the above)
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

3. What is the type of cable composed of many fine wires?
Stranded
Energy
Insulation resistance and Dielectric strength(Both A and B)
Start with the band on the end and read to the center

4. What do we call the process of replacement of vapor above a liquid with a nonflammable gas?
Circular and square mills(Both A and B)
Amperes
Purging
Secondary cell

5. What does static electricity do?
12 volts
Heat
Does not move
10

6. What is a switch that operates by electricity?
Parallel circuit
Relay
Serial
A magnetic field

7. What determines whether a spark can be produced?
Stranded
Cell
Strength of the charge
--^V^V^V^---

8. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
Voltmeter
Strength of the charge
20%
The direction of the magnetic field

9. Identify the general blueprint symbol for inductors.
Unlike poles attract
Series circuit
Insulation resistance and Dielectric strength(Both A and B)
Symbol

10. What instrument measures voltage?
First digit
Alternating current
Voltmeter
Use an effect to produce another effect

11. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
Fixed - tapped - variable(all of the above)
Potential difference
Produce heat - light - or limit current to control it(all of the above)

12. What is induction?
Current change in a coil creates a magnetic change
First digit is 9
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Cells can be connected together to make a battery

13. 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
First digit
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)
75 Ohms
Chemical action

14. What is a common form used in conductors?
Amperes
Relationship between current and potential difference
Unlike poles attract
Cables

15. What wire measurement is commonly used in the U.S.?
Cells can be connected together to make a battery
Ability to store an electric charge
Alternating current
American wire gauge(AWG)

16. Which type of cell can be recharged?
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)
First digit is 9
Secondary cell
Volts

17. What is resistance in electrical terms?
Wire splices
Common - not rechargable - gradually discharges when in storage(All of the above)
Plastic - Rubber - Friction(all of the above)
Opposition to electrical current

18. What makes electrons flow?
Voltmeter
Circular and square mills(Both A and B)
Potential difference
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

19. What must be large enough to carry the largest current likely to occur?
Stores electrical charge
Insulation resistance and Dielectric strength(Both A and B)
Grounding wire
Solenoid and Relay(both A and B)

20. How is capacitance determined?
5%
Area and spacing of capacitor - static current in the capacitor(both A and B)
From the negative battery terminal to the positive terminal
Common - not rechargable - gradually discharges when in storage(All of the above)

21. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
20%
Circular and square mills(Both A and B)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

22. What do electrical charges need to cause a fire or explosion?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Potential difference
Bonding and grounding
Opposition to electrical current

23. What is an electromagnet?
Symbol
20%
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

24. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
Electromagnetic field
Volts
The relationship of potential difference to current

25. What does Ohm's Law represent?
The relationship of potential difference to current
Relationship between current and potential difference
Fixed - Electrolytic - Variable(all of the above)
By their covering

26. Why is the transformer important to AC electricity?

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27. What is a characteristic of insulators?
Symbol
Secondary cell
Choke
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

28. What makes electrons flow?
Opposition to movement of free electrons
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
DC current
Potential difference

29. What determines the resistance of a resistor?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Composition of the resistor
Solenoid and Relay(both A and B)
Produce heat - light - or limit current to control it(all of the above)

30. What is insulation resistance?
Potential difference - E*I - current times current change from point to point(all of the above)
Electrical resistance against the flow of current
Moving vehicles
Circular and square mills(Both A and B)

31. What cannot be transformed to higher or lower potential differences?
DC current
Use an effect to produce another effect
Stranded
Potential difference - E*I - current times current change from point to point(all of the above)

32. What does a moving charge produce?
Energy
A magnetic field
High resistance
15 -000 ohms - 20%

33. What is a conductor?
Symbol
Produce heat - light - or limit current to control it(all of the above)
Secondary cell
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

34. What can permanently break down a capacitor?
Breakdown voltage
1 watt
Heat
First digit

35. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
By their covering
Serial
Stranded

36. What does a third band of brown mean?
Gauge number
10
1/1000th of an inch
The direction the negative charge moves

37. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Breakdown voltage
Solenoid and Relay(both A and B)
Chemical action

38. What do transducers do in electrical terms?
Use an effect to produce another effect
Cell
Gauge number
Stores electrical charge

39. How do you read resistor color codes?
Fixed - Electrolytic - Variable(all of the above)
5%
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Start with the band on the end and read to the center

40. What is a property of inductors in electrical circuits?
Current change in a coil creates a magnetic change
10
Opposes any change in the current flowing in a circuit
A difference in potential energy

41. The generator is what method of creating potential energy?
20%
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Electromagnetism
Wire splices

42. Identify the blueprint symbol for resistors.
--^V^V^V^---
First digit
Resistance increases as the conductor length increases
A magnetic field

43. What is a type of mechanical transducer?
Symbol
Energy
Solenoid and Relay(both A and B)
Wire splices

44. 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
Electromagnetic field
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
12 volts
Parallel

45. What does a first band of white mean?
First digit is 9
Insulation resistance
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Stranded

46. Identify the blueprint symbol for capacitors.
Magnetic properties
Produce heat - light - or limit current to control it(all of the above)
The direction the negative charge moves
Symbol

47. What is the purpose of resistors in electrical circuits?
Opposition to electrical current
Symbol
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Produce heat - light - or limit current to control it(all of the above)

48. What information do the Left-Hand Rules provide?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
From the negative battery terminal to the positive terminal
The direction the negative charge moves
Volts

49. 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)
Cells can be connected together to make a battery
From the negative battery terminal to the positive terminal
Bonding and grounding

50. What type of circuit has two or more paths for current to follow?
Parallel circuit
Potential difference
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
The rate of doing work