Week 3: Intro to Gauss's law Flashcards

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1
Q

Gauss’s Law Equation

A

EAcos(theta)=q/(e04pi)

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2
Q

Epsilon Naught (e0) Value

A

e0 = 8.85X10^-12 F(fardas)/m

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3
Q

𝜎

A

Q/(𝝅r^2)

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4
Q

Electric Flux is proportional to?

A

Sources Inside

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5
Q

conductor

A

object with properties that allow charges to move about freely within it

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6
Q

dipole

A

two equal and opposite charges that are fixed close to each other

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7
Q

ρ (rho)

A

charge/volume

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8
Q

Flux

A

How a vector field goes through an electric surface / how many field lines go through an electric field

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9
Q

how is D and electric field related inside a charged object

A

As D increases, electric field increases

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10
Q

What is q enc

A

the enclosed charge

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11
Q

Surface area of a sphere

A

4πR^2

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12
Q

Q for a sphere

A

p(4/3)πR^3

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13
Q

D

A

Distance to the point of interest in a sphere

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14
Q

When D and R are equal

A

The electric field of charged sphere is at its max

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15
Q

E(4(pi)D^2)=

A

Q/ε0 for spherical distributions

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16
Q

What is P?

A

P = charge/volume

17
Q

What is Enet?

A

Enet is the total electric field

18
Q

When an electric flux = 0

A

The electric flux will be zero when the area vector is perpendicular to the direction of the electric field

19
Q

A

a unit vector perpendicular to the plane formed by the two vectors

20
Q

Relationship D and E inside a charged sphere

A

Linear - as the distance from the center gets bigger, the charge (E) increases

21
Q

k value

A

9X10^9

22
Q

Equation for E when the POI is within the charged sphere

A

E = (pd/3Eo)

23
Q

What does D represent

A

The radius of sphere enclosing the charge

24
Q

What is P.O.I

A

point of interest

25
Q

What is the Gaussian surface also known as?

A

The closed/imaginary surface

26
Q

What shape does the electric field take on?

A

Whatever the shape of the charged surface is.

27
Q

Calculating the electric field outside of a solid sphere

A

E=kQ/D^2 or E=Q/(4pi eO D^2)

28
Q

In what direction do the electric field arrows face of a positive charge?

A

Outwards from charge

29
Q

In what direction do the electic field arrows face from a negative charge?

A

Towards the charge

30
Q

R

A

The radius of the real surface

31
Q

As D increases what does E do inside the charged object?

A

E increases

32
Q

Formula for an electric field involving a disk

A

E = (k𝜎2pi)*(1-(D/(sqrt(D^2+R^2)))

33
Q

Formula for an electric field involving a ring

A

E = (k2piRλD)/((R^2+D^2)^3/2)