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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?
Mutual induction
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Tolerence
DC current

2. What is the name for electrical resistance of insulation?
Electromagnetism
Insulation resistance
Does not move
Bonding and grounding

3. Which of the following materials is NOT a good conductor?
Energy
The relationship of potential difference to current
Porcelain
Electrical resistance against the flow of current

4. What are the names of two of the six primary methods of producing a voltage?
A difference in potential energy
Solenoid and Relay(both A and B)
Chemical action - electromagnetism - contact - heat - light - deformation(all of the above)
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

5. What is the basic law of magnetic force?
Unlike poles attract
Potential difference
Insulation resistance and Dielectric strength(Both A and B)
Purging

6. What results when current is run through a material with high resistance?
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)
Heat
Potential difference - E*I - current times current change from point to point(all of the above)
Heat and current control(both a and c)

7. What are the common units of measurement for round and square conductor cross - sections?
Common - not rechargable - gradually discharges when in storage(All of the above)
First digit
Serial
Circular and square mills(Both A and B)

8. What is a conductor?
Current change in a coil creates a magnetic change
Insulation resistance and Dielectric strength(Both A and B)
10%
A material capable of carrying an electric current Silver - Copper - and Aluminum(Both A and C)

9. What do we call the ability to do work?
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)
Ohms
Energy
Current change in a coil creates a magnetic change

10. What does a moving charge produce?
Potential difference
Use an effect to produce another effect
A magnetic field
Series circuit

11. What do transducers do in electrical terms?
Use an effect to produce another effect
Relay
Parallel
Heat

12. What is true about a dry cell?
Serial
Common - not rechargable - gradually discharges when in storage(All of the above)
Two
1 watt

13. What is a type of mechanical transducer?
Solenoid and Relay(both A and B)
Moving vehicles
Heat and current control(both a and c)
Electromagnetic field

14. What can permanently break down a capacitor?
Bonding and grounding
Breakdown voltage
Stranded
DC flows continuously in one direction and AC potential difference and current both change direction

15. What is the use of the electromagnet?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Potential difference - E*I - current times current change from point to point(all of the above)
High resistance
Cell

16. What does Ohm's Law represent?
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Relationship between current and potential difference
12 volts
Moving vehicles

17. What do electrical charges need to cause a fire or explosion?
High resistance
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)
Gauge number
Means to maintain a potential difference - means to generate spark - spark in a flammable atmosphere(all of the above)

18. Which way is the current going in the circuit shown?(electron flow)
Produce heat - light - or limit current to control it(all of the above)
From the negative battery terminal to the positive terminal
Amperes
Heat

19. What is capacitance in electrical terms?
Opposition to electrical current
5%
Ability to store an electric charge
The rate of doing work

20. What is the unit of measurement of electrical current?
Solenoid and Relay(both A and B)
Amperes
First digit
Produce heat - light - or limit current to control it(all of the above)

21. What is needed for electric heating elements and the filaments of light bulbs?
High resistance
Breakdown voltage
Ability to store an electric charge
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

22. If the fourth color band is silver - this means the measured value of the resistance is what percent of the marked value?
Parallel circuit
1 watt
Heat
10%

23. What information do the Left-Hand Rules provide?
Voltage
12 volts
Breakdown voltage
Direction of: electric charge - magnetic field - force of the moving charge(all of the above)

24. A resistor is color coded brown - green - orange. What is its resistance?
Gauge number
15 -000 ohms - 20%
Stranded
Purging

25. What type of circuit has two or more paths for current to follow?
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Parallel circuit
DC flows continuously in one direction and AC potential difference and current both change direction
Resistance value can not be changed

26. What is voltage?
Current flows in one direction - potential differences across a load does not change(Both A and B)
A difference in potential energy
Circular and square mills(Both A and B)
Symbol

27. How is capacitance determined?
Parallel
First digit is 9
Area and spacing of capacitor - static current in the capacitor(both A and B)
Cables

28. The dry cell is what method for creating potential energy?
Chemical action
12 volts
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)

29. What is a characteristic of a fixed resistor?
Resistance value can not be changed
By their covering
Electromagnetic field
Insulation resistance

30. What is 'difference in potential(potential difference) - per unit of charge - between two points'?
Voltage
The direction the negative charge moves
First digit is 9
Mutual induction

31. How many kinds of poles do magnets have?
Two
Electrical resistance against the flow of current
To prevent Physical - Chemical to wiring - to prevent damage to people and property(all of the above)
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)

32. What is a common measure of wire diameter?
--^V^V^V^---
Gauge number
75 Ohms
20%

33. What is the measure of potential difference?
Amperes
12 volts
Volts
Potential difference

34. How do static charges distribute themselves?
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
Composition of the resistor
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Breakdown voltage

35. Why is the transformer important to AC electricity?

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36. What is a rigid metal conduit?
Amperes
Physical protection for conductors - Grounding for conductors - Concealment for conductors(all of the above)
Opposition to electrical current
Wire splices

37. What is the fundamental property of insulators?
Serial
Grounding wire
Insulation resistance and Dielectric strength(Both A and B)
Wire splices

38. What makes electrons flow?
Potential difference
DC flows continuously in one direction and AC potential difference and current both change direction
Insulation resistance
Does not move

39. What wire measurement is commonly used in the U.S.?
High dielectric and mechanical strength - tempurature and moisture resistance - flexible(All of the above)
American wire gauge(AWG)
Parallel circuit
Ability to store an electric charge

40. Identify the blueprint symbol for resistors.
Volts
--^V^V^V^---
Ohms
Electromagnetic field

41. What cannot be transformed to higher or lower potential differences?
15 -000 ohms - 20%
Start with the band on the end and read to the center
DC current
Lifting devices - chucks and clutches - brakes and pulleys(all of the above)

42. What is produced when an alternator rotates 360 electrical degrees through a magnetic field?
High resistance
Insulation resistance
Stores electrical charge
Alternating current

43. How is the heat production measured in a resistor?
10
Composition of the resistor
Potential difference - E*I - current times current change from point to point(all of the above)
Purging

44. What is the unit of measurement of potential difference?
Does not move
Current flows in one direction - potential differences across a load does not change(Both A and B)
Chemical action
Volts

45. What is the difference between AC and DC?
Insulation resistance and Dielectric strength(Both A and B)
First digit
Electromagnetic field
DC flows continuously in one direction and AC potential difference and current both change direction

46. What is the relationship between cells and batteries?
Cells can be connected together to make a battery
Bonding and grounding
Evenly over the surface of a sphere and concentrated on points of objects(both A and C)
The direction of the magnetic field

47. What does a first band of white mean?
First digit is 9
Opposition to electrical current
A coil of wire that: carries current - has a magnetic field inside - and can have a bar of steel inside
Voltmeter

48. What types of protective tapes are used?
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)
Plastic - Rubber - Friction(all of the above)
Heat and current control(both a and c)

49. Where do the fingers point in both Left-Hand Rules?
The direction of the magnetic field
Amperes
Opposition to movement of free electrons
12 volts

50. What is a way to classify wires and cables?
Parallel circuit
Bonding and grounding
Common - not rechargable - gradually discharges when in storage(All of the above)
By their covering