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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 must be large enough to carry the largest current likely to occur?
5%
A difference in potential energy
How much potential difference can a material withstand before breaking down
Grounding wire

2. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
Area and spacing of capacitor - static current in the capacitor(both A and B)
12 volts
First digit

3. What is the relationship of conductor size and length to resistance?
Resistance increases as the conductor length increases
15 -000 ohms - 20%
Plastic - Rubber - Friction(all of the above)
Does not move

4. Where do the fingers point in both Left-Hand Rules?
Plastic - Rubber - Friction(all of the above)
The direction of the magnetic field
DC current
Composition of the resistor

5. How do you read resistor color codes?
Serial
Start with the band on the end and read to the center
--^V^V^V^---
High resistance

6. What can permanently break down a capacitor?
Opposes any change in the current flowing in a circuit
Ohms
Breakdown voltage
Current change in a coil creates a magnetic change

7. What type of circuit has one path of follow through a load?
Series circuit
Start with the band on the end and read to the center
15 -000 ohms - 20%
Composition of the resistor

8. What is the term for two or more cells attached together?
Heat
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Battery
Potential difference

9. What is true about a dry cell?
1 watt
By their covering
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Common - not rechargable - gradually discharges when in storage(All of the above)

10. What types of protective tapes are used?
Potential difference - E*I - current times current change from point to point(all of the above)
1 watt
10%
Plastic - Rubber - Friction(all of the above)

11. What are the names of two of the six primary methods of producing a voltage?
Bare - covered - insulated - stranded - cable(All of the above)
Opposition to electrical current
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)

12. What is the unit of measurement of potential difference?
Porcelain
High resistance
Volts
Magnetic properties

13. What is a common measure of wire diameter?
Wire splices
Porcelain
The direction the negative charge moves
Gauge number

14. What is an electromagnet?
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
10%
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Battery

15. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Bare - covered - insulated - stranded - cable(All of the above)
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)
Energy
Serial

16. What does static electricity do?
Alternating current
Voltage
Does not move
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

17. What is a type of capacitor?
The relationship of potential difference to current
Fixed - Electrolytic - Variable(all of the above)
Does not move
Breakdown voltage

18. What is a rigid metal conduit?
Magnetic properties
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Relationship between current and potential difference
DC flows continuously in one direction and AC potential difference and current both change direction

19. What do we call the ability to do work?
Energy
Resistance increases as the conductor length increases
Parallel circuit
Insulation resistance

20. What is power?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Electromagnetic field
The rate of doing work
DC flows continuously in one direction and AC potential difference and current both change direction

21. What does a moving charge produce?
Voltmeter
A magnetic field
Ability to store an electric charge
Resistance value can not be changed

22. What does an object have if a magnetic field acts on it?
10%
Electromagnetic field
Magnetic properties
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

23. What does a first band of white mean?
Tolerence
Current change in a coil creates a magnetic change
First digit is 9
10%

24. What is an arrangement of materials that create a potential difference by chemistry?
Plastic - Rubber - Friction(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
A magnetic field
Cell

25. What is a common form used in conductors?
Cables
Plastic - Rubber - Friction(all of the above)
Opposition to movement of free electrons
Mutual induction

26. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
Stores electrical charge
Amperes
DC current

27. What is a switch that operates by electricity?
--^V^V^V^---
Relay
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
First digit is 9

28. When reading resistance color codes - what does the fourth band indicate?
Tolerence
A difference in potential energy
Unlike poles attract
Energy

29. The thermocouple uses which method for creating potential energy?
Amperes
Solenoid and Relay(both A and B)
Fixed - tapped - variable(all of the above)
Heat

30. Identify the blueprint symbol for resistors.
Parallel circuit
--^V^V^V^---
Produce heat - light - or limit current to control it(all of the above)
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)

31. What is a wire classification?
Fixed - tapped - variable(all of the above)
Bare - covered - insulated - stranded - cable(All of the above)
A difference in potential energy
Parallel circuit

32. What is a characteristic of insulators?
Resistance value can not be changed
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
1 watt
Does not move

33. The generator is what method of creating potential energy?
Symbol
Solenoid and Relay(both A and B)
Electromagnetism
Gauge number

34. What is another name for an inductor?
Choke
Volts
Serial
Potential difference

35. What is dielectric strength?
Stores electrical charge
How much potential difference can a material withstand before breaking down
Choke
1 watt

36. What determines whether a spark can be produced?
Strength of the charge
Bonding and grounding
By their covering
Electromagnetism

37. The dry cell is what method for creating potential energy?
Voltage
Plastic - Rubber - Friction(all of the above)
Volts
Chemical action

38. What is the relationship between cells and batteries?
Heat
Potential difference
Grounding wire
Cells can be connected together to make a battery

39. Identify the general blueprint symbol for inductors.
Common - not rechargable - gradually discharges when in storage(All of the above)
Symbol
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Secondary cell

40. What is the purpose of a raceway?
Voltage
Potential difference - E*I - current times current change from point to point(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Moving vehicles

41. Which way is the current going in the circuit shown?(electron flow)
Unlike poles attract
Choke
From the negative battery terminal to the positive terminal
Secondary cell

42. What type of circuit has two or more paths for current to follow?
DC flows continuously in one direction and AC potential difference and current both change direction
Parallel circuit
Start with the band on the end and read to the center
Heat

43. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
Ability to store an electric charge
20%
50 Ohms
Solenoid and Relay(both A and B)

44. What do transducers do in electrical terms?
Cables
Parallel
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Use an effect to produce another effect

45. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
Alternating current
12 volts
Opposition to movement of free electrons
How much potential difference can a material withstand before breaking down

46. When does a DC circuit oppose current flow?
Energy
Amperes
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Moving vehicles

47. What information do the Left-Hand Rules provide?
By their covering
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Two

48. Which of the following is a type of resistor?
Opposition to electrical current
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Fixed - tapped - variable(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

49. What is induction?
Amperes
Circular and square mills(Both A and B)
Current change in a coil creates a magnetic change
Heat

50. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
First digit
Cables
Symbol