(Generals)Basic Electricity I > Basic Electricity 1 Study Guide > Flashcards

Basic Electricity 1 Study Guide Flashcards

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1
Q
  1. What are valence electrons?
A

Outer shell

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

Insulator

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

Conductor

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4
Q
  1. Actual current flow is from
A

Negative to Positive.

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4
Q
  1. The conventional theory says electricity flows from
A

Positive to Negative.

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5
Q
  1. What is E.M.F.?
A

Electromotive Force

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6
Q
  1. What is E.M.F. measured in?
A

Voltage

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7
Q
  1. What letter is used to represent voltage (E.M.F.)?
A

E

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8
Q
  1. Current is defined as?
A

Flow of electron

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9
Q
  1. Current is measured in what unit?
A

Amps

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10
Q
  1. What letter is used to designate current?
A

I

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11
Q
  1. Resistance is defined as what?
A

Opposition to electron flow

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12
Q
  1. Resistance is measured in what?
A

Ohms

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13
Q
  1. Resistance is designated by what letter?
A

R

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14
Q
  1. Power is defined as what?
A

Work done in a circuit

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15
Q
  1. Power is measured in what?
A

Watts

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16
Q
  1. What letter is used to designate power?
A

P

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17
Q
  1. Convert .0056 volts to milli-volts.
A

5.6 kV

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18
Q
  1. Convert 24,175 ohms to kilo-ohms.
A

24.175k Ohms

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19
Q
  1. Convert 31.7 mega-ohms to ohms.
A

31,700,000 Ohms

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20
Q
  1. Convert 5.3 micro-amps to amps.
A

0.0000053m A

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21
Q
  1. What are the two formulas used to represent ohms’ law?
A

E=IR P=IE

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22
Q
  1. What voltage is required to push 3 amps through 800 ohms of resistance?
23
Q
  1. How much resistance would be present in a 24 volt circuit with 4.8 amps of current?
24
25. How much current would flow through a circuit having 50 kilo-ohms of resistance and 100 volts?
0.002 V
25
26. What is the power used by a circuit having 1.2 amps through 150 ohms of resistance?
216 W
26
27. What is the total power of a 24 volt circuit having four 1200 ohm resistors in series?
.12 W
27
28. What remains constant in a series circuit?
Current
28
29. What remains constant in a parallel circuit?
Voltage
29
30. The first band on a resistor designates what?
First significant digit
30
31. The second band on a resistor designates what?
Second significant digit
31
32. The third band on a resistor designates what?
Multiplier (number of zeros)
32
33. The fourth band on a resistor designates what?
Tolerance
33
34. If there is no fourth band, the resistor tolerance will be what?
+/- 20%
34
35. What would the value of a resistor with the following color code be; Green, Yellow, Red, Silver.
5400 Ohms +-10%
35
36. What would the value of a resistor with the following color code be; Blue, Brown, Grey, Gold.
6,200,000,000 +- 5%
36
37. Magnetic lines of flux will (go through, or go around) soft iron?
Go Through
37
38. Magnetic fields flow from
North to South
38
39. Static electricity will distribute evenly on Uniform surfaces, but will collect on
Rough surfaces.
39
40. What is the “left hand rule” for conductors?
Thumb - direction of electron flow / Fingers - direction of flux travel.
40
41. What is the “left hand rule” for coils?
Thumb - Points to north pole / Finger - Direction of electron flow.
41
42. A rheostat controls power by _________ through a circuit.
Varying The Current
42
43. A potentiometer controls power by _______ through a circuit.
Varying The Voltage
43
44. As the length of a wire increases, the resistance will
Increase
44
45. As the diameter of a wire increases, the resistance will
Decrease
45
46. What type of circuit breakers do aircraft have?
Push
46
47. Excessive Static charges can be eliminated on an aircraft in flight by the use of what?
Static Wick
47
48. Electromagnetic induction is when electricity is produced by moving a
Conductor Through A Line Of Magnetic Flux.
48
49. What is used to statically balance aircraft structures to the same electrical potential?
Bonding Strap
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.
Zero
50
51. A voltmeter is connected into a circuit how?
Parallel
51
52. An ammeter is connected into a circuit how?
Series
51
53. What are the steps for connecting an ohmmeter in a circuit?
Power off, parallel, and isolated
52
54. What type of meter supplies its own power?
Ohmmeter
53
55. What is the purpose of the reflective strip on the face of an analog meter?
Act like a mirror for accurate reading view straight on.
(Generals)Basic Electricity I
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