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Shn > GENERAL PHYSICS II > Flashcards

GENERAL PHYSICS II Flashcards

1
Q

Are simply passive device that can store an electrical charge on their plates when connected to voltage source

A

CAPACITORS

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2
Q

How many parallel conductive plates does capacitor have which are not connected or touching each other, but are electrically separated by insulating material.

A

2 two

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3
Q

What is called to the insulating layer between a capacitor plate

A

Dialectic

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4
Q

Capacitance value and voltage rating

A

Capacitors

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5
Q

Is the measure of a capacitors ability to store an electrical charge onto it’s two plates

A

Capacitance

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6
Q

Si unit of capacitance

A

Farad ( f )

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7
Q

Farad is named after the British physicist ?

A

Michael Faraday

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8
Q

mf ×10–³

A

Milifarad

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9
Q

µF ×10-⁶

A

Microfarad

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10
Q

nF ×10-⁹

A

Nanofarad

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11
Q

Smallest unit of capacitance

A

Picofarad

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12
Q

pF ×10-¹²

A

Picofarad

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13
Q

Formula of capacitance of a capacitor

A

C= e0 L²
——
d

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14
Q

Constant value of e0

A

8.85 × 10-¹² C²/ N.m²

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15
Q

Capacitance value and depends upon three main factors

A
  1. Surface area
  2. Distance
  3. Dialectric Material
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16
Q

The larger the area the greater the capacitance

A

Surface area

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17
Q

Between the two plates, the smaller the distance the greater the capacitance

A

Distance

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18
Q

The higher the permitivity of the dialectric the greater the capacitance

A

Dialectric material

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19
Q

Electric connections

A

Series and parallel capacitors

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20
Q

Definition of series capacitors

A

Consecutive capacitors

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21
Q

Definition of parallel capacitors

A

One plate of each capacitor is connected directly to one terminal of the source

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22
Q

Ctotal of series

A

All over one.
_____1____________
= ¹/c¹ + ¹/ c² + ¹/c³

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23
Q

Ctotal of series

A

Take the sum.

= C¹ + C² + C³

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24
Q

Q total of series

A

Same and identical

Q¹ = Q² = Q³

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25
Q

QTotal of parallel

A

Take the sum

= Q¹ + Q² + Q³

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26
Q

Vtotal

A

= V¹ + V² + V³

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27
Q

Sum of the voltage drop of each capacitor

Same computation for series and parallel

A

Vtotal

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28
Q

Movement or flow of the charge

A

Electric current

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29
Q

Analogy

A

Flow of water on the river

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30
Q

Si unit of electric current

A

Ampere ( A )

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31
Q

The Si unit of electric current is named after the physicist

A

André - Marie Ampere

32
Q

1 ampere is equivalent to?

A

1 coulumb per second

1coulumb / 1 second

33
Q

Symbol of electric current

A

I (caps i)

34
Q

Symbol of dialectic constant

A

K

35
Q

What will happen to the value of capacitance when inserting a dialectic material between plates of a capacitor?

A

Changes / increases

36
Q

Good dialectrics

A

• Materials with large values of K.
• this are usually highly iconic, meaning that they contain positive and negative ions bound together.

37
Q

Materials that are very iconic tend to have

A

Largest value of K

38
Q

Materials that are NOT ICONIC tend to have

A

Smallest value of K

39
Q

The actual value of the dialectric constant depends on the

A

Material

40
Q

Series Circuit

A
  • Closed circuit
  • not common in homes
  • Unreliable wirings
  • bulbs are dependent with each other
41
Q

Parallel Circuit

A
  • Closed Circuit
  • Commonly used in homes
  • reliable wirings
  • bulbs are INDEPENDENT
42
Q

Path for transmitting electric current

A

Electric circuit

43
Q

Parts of an electric circuit

A
  • Battery / a generator
  • Bulbs / Lamps
  • key / Switch
  • Wires
44
Q

Primary sources of energy

A

Battery

45
Q

Device that use current

A

Bulb

46
Q

Control the circuit

A

Switch

47
Q

Transmission lines

A

Wires

48
Q

Incomplete path which means there is NO FLOW of current

A

Open Circuits

49
Q

Complete path and THERE IS a FLOW OF CURRENT

A

Closed circuit

50
Q

Three elements of electricity

A

Voltage, current, and resistance

51
Q

The three elements follows the

A

Ohms law

52
Q

Formula for resistance

A

R = I
__
V

53
Q

Si unit of resistance

A

Ohms ( Ω )

54
Q

The value of wires resistance depends on its

A

Composition, size, and shape

55
Q

It is useful to define a quantity of p called resistivity, where the value of p depends on the

A

Material used to make the wire, but not on its shape and size

56
Q

Regulate, limit and control the current flowing anywhere in a circuit

A

Resistor

57
Q

Measurements of resistors value

A

Resistance

58
Q

Si unit of resistor

A

Ohms

59
Q

Ohms was named after the physicist

A

Georg Simon Ohm

60
Q

Is a way of showing the value of a resistor

A

Resistor colour code

61
Q

Band A

A

1st digit

62
Q

Band b

A

2nd digit

63
Q

Band c

A

Multiplier

64
Q

Band D

A

Tolerance

65
Q

Black

A

00 ×1

66
Q

Brown

A

11×10

67
Q

Red

A

2

68
Q

Orange

A

3

69
Q

Yellow

A

4

70
Q

Green

A

5

71
Q

Blue

A

6

72
Q

Violet

A

7

73
Q

Grey

A

8

74
Q

White

A

9

75
Q

Gold

A

-1

76
Q

Silver

A

-2

77
Q

Is the percentage of error in the resistors resistance

A

Tolerance

Shn (7 decks)

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