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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

A

Conductor

25
Q

Silver

A

Conductor

26
Q

Aluminum

A

Conductor

27
Q

materials that hinder flow of electrons

A

Insulator

28
Q

glass

A

Insulator

29
Q

rubber

A

Insulator

30
Q

consider neither conductor nor insulator

A

Semi-conductor

31
Q

Silicon

A

Semi-conductor

32
Q

low contact of electricity

A

metalloids

33
Q

electric charges unit

A

Coulomb C

34
Q

charge of single electron & proton

A

Elementary Charge (e)

35
Q

micro coulomb

A

1 x 10^-6

36
Q

nano coulomb

A

1 x 10^-9

37
Q

formula of number of electrons

A

total charges / 1.6 x 10^-19 C

38
Q

quantifies amount of electrostatic force that two charged objects exert on each other, which cause attraction/repulsion between them

A

Charles-Agustine De Coulomb

39
Q

Coulomb Formula

A

Fe= ke ∣q1q2 ∣ / r^2

40
Q

cm to m

A

divide 100 (2 decimals)

41
Q

mm to m

A

divide 1000 (3 decimals)

42
Q

Electrical Force/Coulomb’s Law unit

A

N

43
Q

Fieldlines

A

Vector

44
Q

exist in region/space around charged object

A

source charge/point charge

45
Q

when another charged object enters filed, electric force acts on it

A

test charge

46
Q

region of space which electric charge will experience a force when placed in it

A

Electrical field

47
Q

Electrical force per unit charge

A

Vector quantity

48
Q

Unit of Electrical Field

A

N/C

49
Q

nearer to the given charge, greater electric field intensity

A

Representation of Electric FIeld

50
Q

inwards

A

electron

51
Q

outward

A

proton

52
Q

Formula of Electrical Field

A

E =F/q ; E= k ∣q ∣/r^2

53
Q

Energy needed to move an electric charge against electric field

A

Electric Potential Energy

54
Q

U EPE unit

A

J

55
Q

Electric Potential Energy Formula

A

U = keq1q2/r

56
Q

EPE

A

Scalar

57
Q

amount of work needed to move an electric charge from its reference point to specific point on electric field

A

Electric Potential/Potential Difference

58
Q

Formula of Potential Difference

A

V= keq/r ; V= U/q ; V=Er

2ND SEM HAEYAJI (4 decks)

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