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Basic Electricity

Instructions:

Answer 50 questions in 15 minutes.
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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. 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
Potential difference - E*I - current times current change from point to point(all of the above)
75 Ohms
Choke
Opposition to electrical current

2. How are the capacitors connected when the combined capacitance equals a sum of all the capacitors?
Cables
Ohms
Voltmeter
Parallel

3. What is the use of the electromagnet?
Volts
Battery
--^V^V^V^---
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

4. Where do the fingers point in both Left-Hand Rules?
Does not move
Solenoid and Relay(both A and B)
The direction of the magnetic field
Voltage

5. What is the relationship of conductor size and length to resistance?
Bare - covered - insulated - stranded - cable(All of the above)
Plastic - Rubber - Friction(all of the above)
Resistance increases as the conductor length increases
Volts

6. If the fourth color band is missing - this means the measured value of the resistance is what percent of the marked value?
20%
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Current change in a coil creates a magnetic change
High resistance

7. What is needed for electric heating elements and the filaments of light bulbs?
Grounding wire
The direction of the magnetic field
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
High resistance

8. What is the unit of measurement of potential difference?
Volts
Cables
The rate of doing work
Amperes

9. What is the relationship between magnetism and electricity?
From the negative battery terminal to the positive terminal
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 electrical current
How much potential difference can a material withstand before breaking down

10. What is the purpose of capacitors in electrical circuits?
Stores electrical charge
50 Ohms
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
By their covering

11. What makes electrons flow?
Voltage
75 Ohms
Potential difference
Amperes

12. What is a characteristic of insulators?
Heat
Does not move
A magnetic field
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)

13. Identify the blueprint symbol for resistors.
--^V^V^V^---
Electromagnetic field
By their covering
Mutual induction

14. How is the heat production measured in a resistor?
Two
Potential difference
Resistance value can not be changed
Potential difference - E*I - current times current change from point to point(all of the above)

15. Identify the blueprint symbol for capacitors.
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Cell
Symbol
Tolerence

16. What results when current is run through a material with high resistance?
Wire splices
Heat and current control(both a and c)
Solenoid and Relay(both A and B)
50 Ohms

17. What is the fundamental property of insulators?
Volts
1 watt
Insulation resistance and Dielectric strength(Both A and B)
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

18. In most applications - what remains constant if the current remains constant and flows in one direction?
Electromagnetic field
Use an effect to produce another effect
Parallel
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

19. Which material has the lowest resistance at ordinary temperatures?
Common - not rechargable - gradually discharges when in storage(All of the above)
15 -000 ohms - 20%
Stores electrical charge
Silver

20. What is insulation resistance?
Electromagnetic field
Tolerence
Electrical resistance against the flow of current
15 -000 ohms - 20%

21. What cannot be transformed to higher or lower potential differences?
Cell
DC current
Area and spacing of capacitor - static current in the capacitor(both A and B)
First digit is 9

22. 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
Insulation resistance
12 volts
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)
Produce heat - light - or limit current to control it(all of the above)

23. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
First digit
Heat and current control(both a and c)
Ability to store an electric charge
Voltage

24. What do we call the ability to do work?
The relationship of potential difference to current
5%
By their covering
Energy

25. What must be large enough to carry the largest current likely to occur?
Moving vehicles
Voltage
Grounding wire
Alternating current

26. What is the basic law of magnetic force?
Choke
American wire gauge(AWG)
Unlike poles attract
Start with the band on the end and read to the center

27. To what measurement do the conductor mills refer?
Bare - covered - insulated - stranded - cable(All of the above)
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)
The direction the negative charge moves
1/1000th of an inch

28. What is a way to classify wires and cables?
By their covering
How much potential difference can a material withstand before breaking down
Magnetic properties
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

29. What is the purpose of a raceway?
Potential difference - E*I - current times current change from point to point(all of the above)
Circular and square mills(Both A and B)
Tolerence
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)

30. What is true about a dry cell?
Electrical resistance against the flow of current
Common - not rechargable - gradually discharges when in storage(All of the above)
Secondary cell
Opposes any change in the current flowing in a circuit

31. What type of circuit has two or more paths for current to follow?
Parallel circuit
DC current
Porcelain
Produce heat - light - or limit current to control it(all of the above)

32. What is a type of capacitor?
Fixed - Electrolytic - Variable(all of the above)
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Series circuit
The rate of doing work

33. What type of circuit has one path of follow through a load?
First digit
1/1000th of an inch
Series circuit
Strength of the charge

34. What does a first band of white mean?
How much potential difference can a material withstand before breaking down
First digit is 9
First digit
Symbol

35. What is the purpose of resistors in electrical circuits?
DC current
Produce heat - light - or limit current to control it(all of the above)
1 watt
Opposes any change in the current flowing in a circuit

36. How many kinds of poles do magnets have?
Two
Unlike poles attract
1 watt
Produce heat - light - or limit current to control it(all of the above)

37. What is a property of inductors in electrical circuits?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Parallel circuit
Opposes any change in the current flowing in a circuit
Serial

38. The thermocouple uses which method for creating potential energy?
The relationship of potential difference to current
Heat
Grounding wire
Secondary cell

39. What is a switch that operates by electricity?
Parallel circuit
Gauge number
Relay
A magnetic field

40. What determines the resistance of a resistor?
Opposition to electrical current
Composition of the resistor
Gauge number
Insulation resistance

41. What is the unit of measurement of electrical current?
By their covering
Amperes
Magnetic properties
First digit is 9

42. What does static electricity do?
Heat
Produce heat - light - or limit current to control it(all of the above)
Does not move
Relationship between current and potential difference

43. What is capacitance in electrical terms?
Electrical resistance against the flow of current
Composition of the resistor
Ability to store an electric charge
1 watt

44. What is another name for an inductor?
Bonding and grounding
Potential difference
Relay
Choke

45. What is dielectric strength?
Insulation resistance
Volts
How much potential difference can a material withstand before breaking down
15 -000 ohms - 20%

46. What is voltage?
Stores electrical charge
Bonding and grounding
Electrical resistance against the flow of current
A difference in potential energy

47. What is a rigid metal conduit?
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Area and spacing of capacitor - static current in the capacitor(both A and B)
Plastic - Rubber - Friction(all of the above)
Cell

48. What are the names of two of the six primary methods of producing a voltage?
High resistance
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Voltmeter

49. What information do the Left-Hand Rules provide?
Alternating current
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Series circuit
Purging

50. Which way is the current going in the circuit shown?(electron flow)
From the negative battery terminal to the positive terminal
Tolerence
When current starts and stops flowing - when an inductor is in the circuit(Both A and B)
Start with the band on the end and read to the center

Can you answer 50 questions in 15 minutes?

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Basic Electricity

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