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2ND SEM HAEYAJI > PHYSICS > Flashcards

PHYSICS Flashcards

1
Q

Electricity comes from Greek word electron means

A

Amber

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2
Q

English physicist found that many substances behaved like amber

A

Sir William Gilbert

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3
Q

invented electric battery

A

Alessandro Volta

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4
Q

when object obtains a net amount positive and negative electric charge

A

Static Electricity

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5
Q

deals with study of interactions that occur when electric charges at rest

A

Electrostatics

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6
Q

basic unit of matter

A

Atom

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7
Q

smallest unit of particle

A

Quarks

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8
Q

+ - are inhabited

A

Nucleus

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9
Q

resides in atom’s outside shells as valence electrons

A

Free Electrons

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10
Q

gain or loss of electrons

A

Ionization

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11
Q

electrons are removed from an atom

A

Positive Ionization

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12
Q

atom has gained electrons

A

Negative Ionization

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13
Q

Said 2 types of electric charges namely positive and negative

A

Benjamin Franklin

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14
Q

Law of Electrostatic Force

A

Attractive, Repel

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15
Q

Formula of Charge

A

+ - 1.6 x 10^19 C

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16
Q

Electrons never created nor destroyed but transferred from material to another

A

Law of Conservation of Charges

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17
Q

driving robbing another objects

A

Charging by Friction

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18
Q

physical contact among objects

A

Charging by Contact/Conduction

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19
Q

negative becomes negative

A

Conduction

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20
Q

electrically charged object brought near a neutral objects creates a charge in object

A

Charging by Induction

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21
Q

negative becomes positive

A

Isulator

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22
Q

charged rod brought near the metal sphere without touching it

A

Charging by Grounding

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23
Q

best conductor metal

A

Silver

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24
Q

materials allow electrons to pass through metal

25
Silver
Conductor
26
Aluminum
Conductor
27
materials that hinder flow of electrons
Insulator
28
glass
Insulator
29
rubber
Insulator
30
consider neither conductor nor insulator
Semi-conductor
31
Silicon
Semi-conductor
32
low contact of electricity
metalloids
33
electric charges unit
Coulomb C
34
charge of single electron & proton
Elementary Charge (e)
35
micro coulomb
1 x 10^-6
36
nano coulomb
1 x 10^-9
37
formula of number of electrons
total charges / 1.6 x 10^-19 C
38
quantifies amount of electrostatic force that two charged objects exert on each other, which cause attraction/repulsion between them
Charles-Agustine De Coulomb
39
Coulomb Formula
Fe= ke ∣q1q2 ∣ / r^2
40
cm to m
divide 100 (2 decimals)
41
mm to m
divide 1000 (3 decimals)
42
Electrical Force/Coulomb's Law unit
N
43
Fieldlines
Vector
44
exist in region/space around charged object
source charge/point charge
45
when another charged object enters filed, electric force acts on it
test charge
46
region of space which electric charge will experience a force when placed in it
Electrical field
47
Electrical force per unit charge
Vector quantity
48
Unit of Electrical Field
N/C
49
nearer to the given charge, greater electric field intensity
Representation of Electric FIeld
50
inwards
electron
51
outward
proton
52
Formula of Electrical Field
E =F/q ; E= k ∣q ∣/r^2
53
Energy needed to move an electric charge against electric field
Electric Potential Energy
54
U EPE unit
J
55
Electric Potential Energy Formula
U = keq1q2/r
56
EPE
Scalar
57
amount of work needed to move an electric charge from its reference point to specific point on electric field
Electric Potential/Potential Difference
58
Formula of Potential Difference
V= keq/r ; V= U/q ; V=Er

2ND SEM HAEYAJI (4 decks)

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