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Phys 208, Fall 2006 Sept. 22, 2006 Electrostatics pot-pourri Electrostatics...pot-pourri • Logistics Homework, Abstract, Next week Electrostatic discharge Corona, sparks, lightning Cultural math Differential form of Gauss’s law Poisson eqn.

Electrostaticspot-pourri Electrostatics pot-pourri

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Page 1: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Ele

ctr

osta

tics...p

ot-

pourr

i

•Logis

tics

–H

om

ew

ork

, A

bstr

act, N

ext

we

ek

•E

lectr

osta

tic d

ischarg

e

–C

oro

na

, spa

rks,

ligh

tnin

g

•C

ultura

l m

ath

–D

iffe

rentia

l fo

rm o

f G

au

ss’s

la

w

–P

ois

so

n e

qn

.

Page 2: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Dra

ma

AR

CS

!htt

p:/

/205.2

43.1

00.1

55/f

ram

es/longarc

.htm

ES

D!

htt

p:/

/en.w

ikip

edia

.org

/wik

i/E

lectr

osta

tic_dis

charg

e#C

auses_of_

ES

D

Lig

htn

ing

htt

p:/

/ww

w.u

ltim

ate

chase.c

om

/Lig

htn

ing_V

ideo.h

tmhtt

p:/

/ww

w.w

vlig

htn

ing.c

om

/vid

eoghost.shtm

l#0

htt

p:/

/ww

w.o

kla

hom

alig

htn

ing.c

om

/

Page 3: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Sim

ple

model

Page 4: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Mean f

ree p

ath

Page 5: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Bre

ak d

ow

n in a

ir

Page 6: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Quenchin

g (e

nerg

y loss p

er

colli

sio

n)

Page 7: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Spark

s

Page 8: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Lig

htn

ing

NO

AA

do

es lig

htn

ing

Page 9: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Recre

ational M

ath

•D

iffe

rential fo

rm o

f G

auss’s

law

•P

ois

son e

quation

òEÿ„

A=

1 e 0 Ÿr „

—◊E

=r e 0

“2f=-

r e 0

Page 10: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Div

erg

ence o

f E

-fie

ld

Page 11: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Diffe

rential (local) form

of G

auss’s

Law

Page 12: Electrostaticspot-pourri Electrostatics pot-pourri

Phys

208,

Fall

2006

Sep

t. 2

2, 2006

Ele

ctro

stat

ics

pot-

po

urr

i

Pois

son e

quation