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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. In most applications - what remains constant if the current remains constant and flows in one direction?
Solenoid and Relay(both A and B)
Electromagnetic field
First digit is 9
1/1000th of an inch

2. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Potential difference
The direction of the magnetic field
Serial

3. What is dielectric strength?
High resistance
From the negative battery terminal to the positive terminal
How much potential difference can a material withstand before breaking down
Serial

4. What is a type of mechanical transducer?
Volts
Solenoid and Relay(both A and B)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
First digit is 9

5. What is a type of capacitor?
Porcelain
Opposition to movement of free electrons
Electromagnetic field
Fixed - Electrolytic - Variable(all of the above)

6. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Symbol
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)
1/1000th of an inch

7. Which type of cell can be recharged?
Secondary cell
Amperes
First digit
From the negative battery terminal to the positive terminal

8. When reading resistance color codes - what does the first band indicate?
First digit
Parallel
Cables
Plastic - Rubber - Friction(all of the above)

9. What do junction boxes protect?
Current flows in one direction - potential differences across a load does not change(Both A and B)
Fixed - tapped - variable(all of the above)
Symbol
Wire splices

10. What is insulation resistance?
American wire gauge(AWG)
Electrical resistance against the flow of current
Opposition to electrical current
DC current

11. What is the relationship between cells and batteries?
Parallel
Alternating current
Cells can be connected together to make a battery
Energy

12. What is the relationship between magnetism and electricity?
Parallel
Tolerence
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

13. What is a switch that operates by electricity?
Serial
Resistance increases as the conductor length increases
Relay
DC current

14. What type of circuit has one path of follow through a load?
Series circuit
Amperes
A magnetic field
Potential difference - E*I - current times current change from point to point(all of the above)

15. What is the type of cable composed of many fine wires?
Parallel circuit
Parallel
1/1000th of an inch
Stranded

16. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
Symbol
Parallel circuit
5%
Choke

17. How many kinds of poles do magnets have?
First digit is 9
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)
Two
50 Ohms

18. 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
Heat
Voltage
75 Ohms
How much potential difference can a material withstand before breaking down

19. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Purging
15 -000 ohms - 20%
Magnetic properties

20. What is a characteristic of insulators?
Use an effect to produce another effect
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
The direction the negative charge moves
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

21. What is the measure of potential difference?
20%
Bonding and grounding
Volts
Cells can be connected together to make a battery

22. The thermocouple uses which method for creating potential energy?
Heat
1/1000th of an inch
The direction the negative charge moves
Silver

23. What wire measurement is commonly used in the U.S.?
American wire gauge(AWG)
Electrical resistance against the flow of current
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
10

24. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Parallel
Opposes any change in the current flowing in a circuit
DC current
Stranded

25. What is the term for doing work at the rate of joule per second?
Resistance increases as the conductor length increases
1 watt
Volts
Electromagnetic field

26. What does resistance produce?
Heat
Use an effect to produce another effect
Ability to store an electric charge
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)

27. What is the fundamental property of insulators?
Insulation resistance and Dielectric strength(Both A and B)
Resistance value can not be changed
1/1000th of an inch
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

28. What information do the Left-Hand Rules provide?
Cells can be connected together to make a battery
DC current
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Wire splices

29. What types of protective tapes are used?
Choke
Opposition to movement of free electrons
The direction the negative charge moves
Plastic - Rubber - Friction(all of the above)

30. What is induction?
Resistance value can not be changed
Current change in a coil creates a magnetic change
Solenoid and Relay(both A and B)
10

31. What is a common measure of wire diameter?
Opposes any change in the current flowing in a circuit
Purging
Gauge number
Fixed - tapped - variable(all of the above)

32. What makes electrons flow?
Potential difference
Serial
Ability to store an electric charge
Grounding wire

33. What type of circuit has two or more paths for current to follow?
Silver
Parallel circuit
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Moving vehicles

34. What is the term used when a magnetic field produced by coil 1 created a current in coil 2?
Mutual induction
Volts
75 Ohms
Series circuit

35. What does a first band of white mean?
Voltage
First digit is 9
Bare - covered - insulated - stranded - cable(All of the above)
20%

36. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Produce heat - light - or limit current to control it(all of the above)
Amperes
Voltage
Breakdown voltage

37. What must be large enough to carry the largest current likely to occur?
Symbol
Use an effect to produce another effect
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Grounding wire

38. How do static charges distribute themselves?
Moving vehicles
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Chemical action
High resistance

39. What is a wire classification?
Moving vehicles
Bare - covered - insulated - stranded - cable(All of the above)
Magnetic properties
Electromagnetic field

40. What determines the resistance of a resistor?
Strength of the charge
Electrical resistance against the flow of current
Composition of the resistor
Insulation resistance

41. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
Resistance value can not be changed
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
DC current

42. The generator is what method of creating potential energy?
20%
Electromagnetism
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cell

43. What is a DC circuit characteristic?
Cables
Does not move
Current flows in one direction - potential differences across a load does not change(Both A and B)
Relationship between current and potential difference

44. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
The direction the negative charge moves
5%
Relay
Alternating current

45. What is capacitance in electrical terms?
How much potential difference can a material withstand before breaking down
Ability to store an electric charge
5%
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

46. What is voltage?
A difference in potential energy
Insulation resistance and Dielectric strength(Both A and B)
Ohms
American wire gauge(AWG)

47. What does an object have if a magnetic field acts on it?
Magnetic properties
DC flows continuously in one direction and AC potential difference and current both change direction
American wire gauge(AWG)
DC current

48. What is the name for electrical resistance of insulation?
Electrical resistance against the flow of current
Insulation resistance
American wire gauge(AWG)
Tolerence

49. Identify the blueprint symbol for resistors.
--^V^V^V^---
Current change in a coil creates a magnetic change
Stranded
Heat

50. 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
12 volts
Grounding wire
Opposition to electrical current
Bonding and grounding