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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 term used when a magnetic field produced by coil 1 created a current in coil 2?
Series circuit
Mutual induction
Current flows in one direction - potential differences across a load does not change(Both A and B)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

2. When reading resistance color codes - what does the fourth band indicate?
Fixed - Electrolytic - Variable(all of the above)
Relationship between current and potential difference
75 Ohms
Tolerence

3. Where do the fingers point in both Left-Hand Rules?
A difference in potential energy
Voltmeter
Heat
The direction of the magnetic field

4. What makes electrons flow?
Stranded
Fixed - tapped - variable(all of the above)
First digit is 9
Potential difference

5. What is the purpose of a raceway?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Grounding wire
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Use an effect to produce another effect

6. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Stores electrical charge
Parallel
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Choke

7. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Stranded
10%
Volts
Resistance value can not be changed

8. What does resistance produce?
Heat
Volts
20%
Electrical resistance against the flow of current

9. What can permanently break down a capacitor?
Purging
Breakdown voltage
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Produce heat - light - or limit current to control it(all of the above)

10. 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)
Magnetic properties
Cables
Silver

11. What determines whether a spark can be produced?
Alternating current
Potential difference
Strength of the charge
Insulation resistance and Dielectric strength(Both A and B)

12. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
DC current
Moving vehicles
Fixed - tapped - variable(all of the above)

13. What is a type of mechanical transducer?
First digit
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Solenoid and Relay(both A and B)
A magnetic field

14. What is a way to classify wires and cables?
By their covering
Heat
1 watt
Use an effect to produce another effect

15. When does a DC circuit oppose current flow?
Moving vehicles
12 volts
Opposes any change in the current flowing in a circuit
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)

16. What is an electromagnet?
15 -000 ohms - 20%
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Plastic - Rubber - Friction(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

17. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Relay
15 -000 ohms - 20%
The rate of doing work

18. What is a wire classification?
Choke
Electrical resistance against the flow of current
Current flows in one direction - potential differences across a load does not change(Both A and B)
Bare - covered - insulated - stranded - cable(All of the above)

19. What is the type of cable composed of many fine wires?
A difference in potential energy
Heat and current control(both a and c)
Stranded
Resistance value can not be changed

20. 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
75 Ohms
Heat
Current flows in one direction - potential differences across a load does not change(Both A and B)
Opposition to electrical current

21. What is an arrangement of materials that create a potential difference by chemistry?
Cell
Mutual induction
The relationship of potential difference to current
Bare - covered - insulated - stranded - cable(All of the above)

22. What does static electricity do?
Amperes
American wire gauge(AWG)
Does not move
Opposes any change in the current flowing in a circuit

23. What is power?
Parallel
The rate of doing work
Battery
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

24. What type of circuit has one path of follow through a load?
Series circuit
Insulation resistance
20%
Wire splices

25. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
1/1000th of an inch
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Volts

26. What is the unit of measurement of resistance?
Ohms
Bare - covered - insulated - stranded - cable(All of the above)
Parallel
Battery

27. Which of the following is a type of resistor?
Fixed - tapped - variable(all of the above)
Potential difference
Energy
Serial

28. What is voltage?
A difference in potential energy
10
Series circuit
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

29. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Composition of the resistor
Ability to store an electric charge
Purging
50 Ohms

30. What does Ohm's Law represent?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Relationship between current and potential difference
Symbol
5%

31. Identify the general blueprint symbol for inductors.
Bonding and grounding
Symbol
Solenoid and Relay(both A and B)
Unlike poles attract

32. What is the unit of measurement of potential difference?
Amperes
The direction the negative charge moves
From the negative battery terminal to the positive terminal
Volts

33. What does an object have if a magnetic field acts on it?
Cables
Magnetic properties
Ability to store an electric charge
Battery

34. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Strength of the charge
Opposes any change in the current flowing in a circuit
Stores electrical charge

35. What wire measurement is commonly used in the U.S.?
Tolerence
American wire gauge(AWG)
Symbol
The direction the negative charge moves

36. How many kinds of poles do magnets have?
Cell
Symbol
Two
Voltage

37. Which way is the current going in the circuit shown?(electron flow)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
From the negative battery terminal to the positive terminal
Wire splices
Opposes any change in the current flowing in a circuit

38. What cannot be transformed to higher or lower potential differences?
DC current
Tolerence
Resistance value can not be changed
Start with the band on the end and read to the center

39. To what measurement do the conductor mills refer?
Alternating current
1/1000th of an inch
First digit
Opposition to movement of free electrons

40. What is the purpose of capacitors in electrical circuits?
Composition of the resistor
--^V^V^V^---
A difference in potential energy
Stores electrical charge

41. What is resistance?
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)
Opposition to movement of free electrons
Electromagnetism
Heat

42. What must be large enough to carry the largest current likely to occur?
Bonding and grounding
Area and spacing of capacitor - static current in the capacitor(both A and B)
Grounding wire
Electrical resistance against the flow of current

43. What do we call the ability to do work?
1 watt
Energy
Heat
Volts

44. What instrument measures voltage?
DC current
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Purging
Voltmeter

45. The generator is what method of creating potential energy?
Electromagnetism
High resistance
5%
Volts

46. What do transducers do in electrical terms?
Area and spacing of capacitor - static current in the capacitor(both A and B)
Potential difference
Use an effect to produce another effect
Parallel

47. How do static charges distribute themselves?
Fixed - tapped - variable(all of the above)
Symbol
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
50 Ohms

48. What is the unit of measurement of electrical current?
Amperes
Cables
Area and spacing of capacitor - static current in the capacitor(both A and B)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

49. What does a third band of brown mean?
10
Secondary cell
Stores electrical charge
Parallel circuit

50. What do electrical charges need to cause a fire or explosion?
Potential difference
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Cell
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)