Basic Electricity 1 Study Guide

Question 1

1. What are valence electrons?

Answer 1

Outer shell

Question 2

2. Materials that have 5 or more valence electrons are known as what?

Answer 2

Insulator

Question 3

3. Materials that have less than 4 valence electrons are known as what?

Answer 3

Conductor

Question 4

4. Actual current flow is from

Answer 4

Negative to Positive.

Question 4

5. The conventional theory says electricity flows from

Answer 4

Positive to Negative.

Question 5

6. What is E.M.F.?

Answer 5

Electromotive Force

Question 6

7. What is E.M.F. measured in?

Answer 6

Voltage

Question 7

8. What letter is used to represent voltage (E.M.F.)?

Answer 7

E

Question 8

9. Current is defined as?

Answer 8

Flow of electron

Question 9

10. Current is measured in what unit?

Answer 9

Amps

Question 10

11. What letter is used to designate current?

Answer 10

I

Question 11

12. Resistance is defined as what?

Answer 11

Opposition to electron flow

Question 12

13. Resistance is measured in what?

Answer 12

Ohms

Question 13

14. Resistance is designated by what letter?

Answer 13

R

Question 14

15. Power is defined as what?

Answer 14

Work done in a circuit

Question 15

16. Power is measured in what?

Answer 15

Watts

Question 16

17. What letter is used to designate power?

Answer 16

P

Question 17

18. Convert .0056 volts to milli-volts.

Answer 17

5.6 kV

Question 18

19. Convert 24,175 ohms to kilo-ohms.

Answer 18

24.175k Ohms

Question 19

20. Convert 31.7 mega-ohms to ohms.

Answer 19

31,700,000 Ohms

Question 20

21. Convert 5.3 micro-amps to amps.

Answer 20

0.0000053m A

Question 21

22. What are the two formulas used to represent ohms’ law?

Answer 21

E=IR P=IE

Question 22

23. What voltage is required to push 3 amps through 800 ohms of resistance?

Answer 22

2400 V

Question 23

24. How much resistance would be present in a 24 volt circuit with 4.8 amps of current?

Answer 23

5 Ohms

Question 24

25. How much current would flow through a circuit having 50 kilo-ohms of resistance and 100 volts?

Answer 24

0.002 V

Question 25

26. What is the power used by a circuit having 1.2 amps through 150 ohms of resistance?

Answer 25

216 W

Question 26

27. What is the total power of a 24 volt circuit having four 1200 ohm resistors in series?

Answer 26

.12 W

Question 27

28. What remains constant in a series circuit?

Answer 27

Current

Question 28

29. What remains constant in a parallel circuit?

Answer 28

Voltage

Question 29

30. The first band on a resistor designates what?

Answer 29

First significant digit

Question 30

31. The second band on a resistor designates what?

Answer 30

Second significant digit

Question 31

32. The third band on a resistor designates what?

Answer 31

Multiplier (number of zeros)

Question 32

33. The fourth band on a resistor designates what?

Answer 32

Tolerance

Question 33

34. If there is no fourth band, the resistor tolerance will be what?

Answer 33

+/- 20%

Question 34

35. What would the value of a resistor with the following color code be; Green, Yellow, Red, Silver.

Answer 34

5400 Ohms +-10%

Question 35

36. What would the value of a resistor with the following color code be; Blue, Brown, Grey, Gold.

Answer 35

6,200,000,000 +- 5%

Question 36

37. Magnetic lines of flux will (go through, or go around) soft iron?

Answer 36

Go Through

Question 37

38. Magnetic fields flow from

Answer 37

North to South

Question 38

39. Static electricity will distribute evenly on Uniform surfaces, but will collect on

Answer 38

Rough surfaces.

Question 39

40. What is the “left hand rule” for conductors?

Answer 39

Thumb - direction of electron flow / Fingers - direction of flux travel.

Question 40

41. What is the “left hand rule” for coils?

Answer 40

Thumb - Points to north pole / Finger - Direction of electron flow.

Question 41

42. A rheostat controls power by _________ through a circuit.

Answer 41

Varying The Current

Question 42

43. A potentiometer controls power by _______ through a circuit.

Answer 42

Varying The Voltage

Question 43

44. As the length of a wire increases, the resistance will

Answer 43

Increase

Question 44

45. As the diameter of a wire increases, the resistance will

Answer 44

Decrease

Question 45

46. What type of circuit breakers do aircraft have?

Answer 45

Push

Question 46

47. Excessive Static charges can be eliminated on an aircraft in flight by the use of what?

Answer 46

Static Wick

Question 47

48. Electromagnetic induction is when electricity is produced by moving a

Answer 47

Conductor Through A Line Of Magnetic Flux.

Question 48

49. What is used to statically balance aircraft structures to the same electrical potential?

Answer 48

Bonding Strap

Question 49

50. Kirchhoff’s voltage law means that if I have a 12 Volt battery in a circuit that the loads in the circuit will use a total of ____ volts.

Answer 49

Zero

Question 50

51. A voltmeter is connected into a circuit how?

Answer 50

Parallel

Question 51

52. An ammeter is connected into a circuit how?

Answer 51

Series

Question 51

53. What are the steps for connecting an ohmmeter in a circuit?

Answer 51

Power off, parallel, and isolated

Question 52

54. What type of meter supplies its own power?

Answer 52

Ohmmeter

Question 53

55. What is the purpose of the reflective strip on the face of an analog meter?

Answer 53

Act like a mirror for accurate reading view straight on.