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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 the basic law of magnetic force?
Mutual induction
First digit is 9
Serial
Unlike poles attract

2. What is the purpose of capacitors in electrical circuits?
Does not move
Stores electrical charge
Cell
50 Ohms

3. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Fixed - tapped - variable(all of the above)
Use an effect to produce another effect
Common - not rechargable - gradually discharges when in storage(All of the above)
50 Ohms

4. What wire measurement is commonly used in the U.S.?
Start with the band on the end and read to the center
A difference in potential energy
10
American wire gauge(AWG)

5. What is the unit of measurement of electrical current?
First digit is 9
Amperes
Bare - covered - insulated - stranded - cable(All of the above)
Electromagnetism

6. What are the two generic methods to eliminate static electricity from metal objects?
Moving vehicles
Does not move
Silver
Bonding and grounding

7. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Stores electrical charge
Area and spacing of capacitor - static current in the capacitor(both A and B)
Alternating current
Relay

8. Identify the general blueprint symbol for inductors.
Symbol
Electromagnetic field
Heat and current control(both a and c)
Voltage

9. What is resistance?
Solenoid and Relay(both A and B)
The direction the negative charge moves
Opposition to movement of free electrons
Ability to store an electric charge

10. What is the measure of potential difference?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Volts
Stranded
Bare - covered - insulated - stranded - cable(All of the above)

11. What is the unit of measurement of potential difference?
Potential difference
Heat and current control(both a and c)
Bare - covered - insulated - stranded - cable(All of the above)
Volts

12. What is the name for electrical resistance of insulation?
Insulation resistance
10%
The relationship of potential difference to current
American wire gauge(AWG)

13. What are the common units of measurement for round and square conductor cross - sections?
Circular and square mills(Both A and B)
By their covering
15 -000 ohms - 20%
Symbol

14. What is needed for electric heating elements and the filaments of light bulbs?
Volts
Bare - covered - insulated - stranded - cable(All of the above)
High resistance
Parallel

15. What types of protective tapes are used?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Plastic - Rubber - Friction(all of the above)
Unlike poles attract
Opposition to electrical current

16. How is capacitance determined?
Solenoid and Relay(both A and B)
Alternating current
Ability to store an electric charge
Area and spacing of capacitor - static current in the capacitor(both A and B)

17. The generator is what method of creating potential energy?
5%
Electromagnetism
--^V^V^V^---
50 Ohms

18. When reading resistance color codes - what does the fourth band indicate?
Tolerence
Fixed - Electrolytic - Variable(all of the above)
Resistance increases as the conductor length increases
Stores electrical charge

19. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
First digit is 9
Circular and square mills(Both A and B)
Volts

20. What is a characteristic of insulators?
Volts
Insulation resistance
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)

21. What instrument measures voltage?
The direction of the magnetic field
Silver
Composition of the resistor
Voltmeter

22. What can permanently break down a capacitor?
Heat and current control(both a and c)
The rate of doing work
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Breakdown voltage

23. When does a DC circuit oppose current flow?
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Use an effect to produce another effect
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)
Current flows in one direction - potential differences across a load does not change(Both A and B)

24. What is the relationship between cells and batteries?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Cells can be connected together to make a battery
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Tolerence

25. What is the difference between AC and DC?
Stranded
DC flows continuously in one direction and AC potential difference and current both change direction
Bonding and grounding
Electromagnetic field

26. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
High resistance
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Moving vehicles
5%

27. What is a conductor?
Potential difference
Tolerence
Stores electrical charge
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

28. 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
How much potential difference can a material withstand before breaking down
12 volts
Potential difference
75 Ohms

29. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Insulation resistance and Dielectric strength(Both A and B)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Mutual induction
Tolerence

30. What is a type of capacitor?
First digit
Alternating current
Fixed - Electrolytic - Variable(all of the above)
Volts

31. How do you read resistor color codes?
A magnetic field
Start with the band on the end and read to the center
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
The relationship of potential difference to current

32. What is the unit of measurement of resistance?
Two
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Electromagnetism
Ohms

33. What is the type of cable composed of many fine wires?
Unlike poles attract
Stranded
Solenoid and Relay(both A and B)
Battery

34. What is a common form used in conductors?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
American wire gauge(AWG)
Relay
Cables

35. What is another name for an inductor?
Heat
15 -000 ohms - 20%
Relationship between current and potential difference
Choke

36. What is an electromagnet?
Cables
Secondary cell
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Stranded

37. To what measurement do the conductor mills refer?
Parallel circuit
Silver
Volts
1/1000th of an inch

38. Where does the thumb point in both Left-Hand Rules?
First digit
The direction the negative charge moves
1 watt
Grounding wire

39. What results when current is run through a material with high resistance?
By their covering
Start with the band on the end and read to the center
Heat and current control(both a and c)
Potential difference

40. What determines whether a spark can be produced?
Stranded
Grounding wire
Strength of the charge
Produce heat - light - or limit current to control it(all of the above)

41. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
Mutual induction
Use an effect to produce another effect
Opposition to electrical current

42. What does a third band of brown mean?
50 Ohms
10
Serial
Relay

43. Identify the blueprint symbol for resistors.
Relay
Potential difference
--^V^V^V^---
Potential difference - E*I - current times current change from point to point(all of the above)

44. What is a switch that operates by electricity?
Voltage
The direction the negative charge moves
Fixed - tapped - variable(all of the above)
Relay

45. What must be large enough to carry the largest current likely to occur?
Magnetic properties
Grounding wire
Heat
Produce heat - light - or limit current to control it(all of the above)

46. The thermocouple uses which method for creating potential energy?
Heat
Moving vehicles
Insulation resistance and Dielectric strength(Both A and B)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

47. What type of circuit has one path of follow through a load?
Parallel circuit
Circular and square mills(Both A and B)
Series circuit
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)

48. What is voltage?
Resistance increases as the conductor length increases
Bare - covered - insulated - stranded - cable(All of the above)
Electromagnetism
A difference in potential energy

49. What is true about a dry cell?
Heat
Wire splices
Relay
Common - not rechargable - gradually discharges when in storage(All of the above)

50. What is power?
A difference in potential energy
Secondary cell
Chemical action
The rate of doing work