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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 relationship between cells and batteries?
--^V^V^V^---
Cells can be connected together to make a battery
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)
By their covering

2. The dry cell is what method for creating potential energy?
Relationship between current and potential difference
Chemical action
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)
1/1000th of an inch

3. How is capacitance determined?
From the negative battery terminal to the positive terminal
Solenoid and Relay(both A and B)
Area and spacing of capacitor - static current in the capacitor(both A and B)
The rate of doing work

4. What does resistance produce?
Heat
Volts
1 watt
Ability to store an electric charge

5. What is true about a dry cell?
Two
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Voltmeter
Common - not rechargable - gradually discharges when in storage(All of the above)

6. What is the use of the electromagnet?
5%
By their covering
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
A difference in potential energy

7. What is the unit of measurement of electrical current?
Relationship between current and potential difference
American wire gauge(AWG)
Amperes
By their covering

8. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
The rate of doing work
Secondary cell
20%
Voltmeter

9. What is a conductor?
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
How much potential difference can a material withstand before breaking down
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Energy

10. When reading resistance color codes - what does the fourth band indicate?
The direction of the magnetic field
Circular and square mills(Both A and B)
Voltage
Tolerence

11. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
10%
15 -000 ohms - 20%
Symbol
Current change in a coil creates a magnetic change

12. Which of the following materials is NOT a good conductor?
1/1000th of an inch
Electromagnetism
Porcelain
High resistance

13. How are the capacitors connected when the combined capacitance equals less than the lowest- value capacitor?
Serial
Battery
Opposes any change in the current flowing in a circuit
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

14. What is the fundamental property of insulators?
75 Ohms
--^V^V^V^---
Amperes
Insulation resistance and Dielectric strength(Both A and B)

15. What do junction boxes protect?
Wire splices
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Bare - covered - insulated - stranded - cable(All of the above)
Serial

16. What makes electrons flow?
Potential difference
Relay
Area and spacing of capacitor - static current in the capacitor(both A and B)
Bare - covered - insulated - stranded - cable(All of the above)

17. What is a type of capacitor?
Relay
Resistance increases as the conductor length increases
Relationship between current and potential difference
Fixed - Electrolytic - Variable(all of the above)

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
Composition of the resistor
75 Ohms
Circular and square mills(Both A and B)
Fixed - Electrolytic - Variable(all of the above)

19. Why is the transformer important to AC electricity?

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20. What is the unit of measurement of resistance?
Ohms
Heat
Potential difference
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)

21. What is a characteristic of insulators?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Insulation resistance
How much potential difference can a material withstand before breaking down
Area and spacing of capacitor - static current in the capacitor(both A and B)

22. What is capacitance in electrical terms?
Potential difference - E*I - current times current change from point to point(all of the above)
Ability to store an electric charge
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Magnetic properties

23. Solve the equation: 35 volts / 0.70 amperes= ? ohms - to find resistance.
50 Ohms
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Opposition to movement of free electrons
The direction the negative charge moves

24. Where do the fingers point in both Left-Hand Rules?
Volts
Moving vehicles
Plastic - Rubber - Friction(all of the above)
The direction of the magnetic field

25. What can permanently break down a capacitor?
How much potential difference can a material withstand before breaking down
First digit
Breakdown voltage
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

26. What is resistance?
Relationship between current and potential difference
Opposition to movement of free electrons
Voltage
Insulation resistance

27. What is an arrangement of materials that create a potential difference by chemistry?
Solenoid and Relay(both A and B)
Produce heat - light - or limit current to control it(all of the above)
Cell
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

28. What do transducers do in electrical terms?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
Fixed - Electrolytic - Variable(all of the above)
Use an effect to produce another effect

29. Where does the thumb point in both Left-Hand Rules?
Grounding wire
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Cells can be connected together to make a battery
The direction the negative charge moves

30. What is the unit of measurement of potential difference?
Volts
The direction of the magnetic field
Relationship between current and potential difference
Mutual induction

31. What wire measurement is commonly used in the U.S.?
Opposition to movement of free electrons
American wire gauge(AWG)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)

32. What results when current is run through a material with high resistance?
Plastic - Rubber - Friction(all of the above)
Heat and current control(both a and c)
Fixed - tapped - variable(all of the above)
First digit is 9

33. To what measurement do the conductor mills refer?
Volts
Composition of the resistor
Cables
1/1000th of an inch

34. What information do the Left-Hand Rules provide?
Opposition to movement of free electrons
Solenoid and Relay(both A and B)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

35. When does a DC circuit oppose current flow?
50 Ohms
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
From the negative battery terminal to the positive terminal
Area and spacing of capacitor - static current in the capacitor(both A and B)

36. What is resistance in electrical terms?
Potential difference - E*I - current times current change from point to point(all of the above)
Opposition to electrical current
Area and spacing of capacitor - static current in the capacitor(both A and B)
Resistance increases as the conductor length increases

37. A resistor is color coded brown - green - orange. What is its resistance?
Mutual induction
15 -000 ohms - 20%
Cells can be connected together to make a battery
The relationship of potential difference to current

38. If the fourth color band is gold - this means the measured value of the resistance is what percent of the marked value?
5%
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)
--^V^V^V^---
Electromagnetic field

39. What is an electromagnet?
First digit is 9
Heat
Moving vehicles
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside

40. How many kinds of poles do magnets have?
Two
Does not move
--^V^V^V^---
1/1000th of an inch

41. Identify the blueprint symbol for resistors.
--^V^V^V^---
Series circuit
Wire splices
Cell

42. What is dielectric strength?
Chemical action
Parallel circuit
How much potential difference can a material withstand before breaking down
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

43. What is the type of cable composed of many fine wires?
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Heat and current control(both a and c)
Opposition to electrical current
Stranded

44. What do we call the ability to do work?
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Energy
Start with the band on the end and read to the center

45. 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)
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
DC flows continuously in one direction and AC potential difference and current both change direction
Volts

46. What are the two generic methods to eliminate static electricity from metal objects?
Ohms
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)
American wire gauge(AWG)
Bonding and grounding

47. What is voltage?
Cell
A difference in potential energy
Energy
DC current

48. What do electrical charges need to cause a fire or explosion?
By their covering
Composition of the resistor
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
Fixed - tapped - variable(all of the above)

49. What is the name for electrical resistance of insulation?
Insulation resistance
Solenoid and Relay(both A and B)
Resistance value can not be changed
Purging

50. The thermocouple uses which method for creating potential energy?
Heat
First digit is 9
Choke
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)