Electricity and magnetism - find the capacitance

21

tapanmast Vora ·2009-03-23 10:58:15

Yah SKY!

I did the same way.... Proceed furhter I guess we'll get da same ans, uless either of us make sum calc. error!!!

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1

? ·2009-03-24 01:30:50

@ btw, how did u do then without having the distance between the plates ??

any other approach ? .....

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11

Anirudh Narayanan ·2009-03-23 18:51:07

unique: y u takin cricket ball everywer??

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21

tapanmast Vora ·2009-03-23 18:50:43

OH ya!!!
I dinno that he was tokin of FOCUS....... Buut thats rite!!!

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11

Mani Pal Singh ·2009-03-23 18:46:57

tapan bhai a/4 pe hi to uska focus hoga!!!!!!!!!!!!!!!!!!

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21

tapanmast Vora ·2009-03-23 18:43:07

unique : y u takin a/4 everywer??

the equation of parabola given is x² = ay

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1

? ·2009-03-23 12:50:51

@ whats in name....distance b/w the plates = a/4 (from x²=ay)

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1

? ·2009-03-23 12:48:15

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? ·2009-03-23 12:44:24

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1

Â°áƒ¦â€¢à¹“ÑÏ…Î ·2009-03-23 12:02:34

m gettin d answer as

(lkÎµ)/(k-1) *lnl

wer i consider d distnce betwn d plates as l

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21

tapanmast Vora ·2009-03-23 11:51:48

sabse gandi bhool jo maine ki thi.....

ab tak ye smiley muje pit raha hai

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1

skygirl ·2009-03-23 11:50:26

arey yeh toh sabse ganda smiley hai :'(

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21

tapanmast Vora ·2009-03-23 11:31:21

OH yah! sky got my mist....

first adha para. n other half are in parrallel matlab 2C....... I did C/2

[222] SILLY MISTAKE KILLS!!!!!!!!!!!!!

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1

? ·2009-03-23 11:30:12

tapan is partially right ....

u have to consider the two now in parallel as well

hence it will be 2C .....

and then ur answer gets right

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1

? ·2009-03-23 11:28:25

we have to consider both in series first and then in parallel

this must be the answer.

C_Eq =(4\varepsilon ka \sqrt{}k-1 )tan^-^1(\sqrt{}k-1)/\sqrt{}k-1

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1

skygirl ·2009-03-23 11:08:35

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1

voldy ·2009-03-23 04:58:01

figure will help da.

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1

skygirl ·2009-03-23 10:36:57

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1

skygirl ·2009-03-23 10:33:51

haan they are in series........... and i realised this soon afetr i logged off...

[2]

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21

tapanmast Vora ·2009-03-23 08:56:25

SORRY 4 FORGERY SKY :

Is da Ans : sumthing lyk : {2tan^-1(√k-1)}*kaÎ¾₀ / (√k-1)

COURTESY : SKY!!!

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21

tapanmast Vora ·2009-03-23 08:45:37

O! I was toking of THE{ WHITE and BLACK strip - combination} being in parallel wid the rest of the strips....

ya the white n the blak strip are in series wid each other.....

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62

Lokesh Verma ·2009-03-23 08:37:32

are the potential drops accross the black and the white region on the small strip the same?

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21

tapanmast Vora ·2009-03-23 08:33:17

parallel hoga naaa

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62

Lokesh Verma ·2009-03-23 08:13:53

sky are these two parts in series or parallel?

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1

skygirl ·2009-03-23 08:07:33

C= aÎµ₀[k ln3 - 4] ?

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skygirl ·2009-03-23 08:03:01

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1

Optimus Prime ·2009-03-23 06:14:00

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1

voldy ·2009-03-23 06:11:59

cylinder ka matlab ahi aaya ab tak .:(

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1

voldy ·2009-03-23 06:11:29

but it says the vertex touches the other plate in the middle ??[7]

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62

Lokesh Verma ·2009-03-23 05:21:45

try capacitors in parallel !!

This time there will be infiniitely many of them with very low width

I guess this is good enuf to be a QOD ;) (Specailly at this stage)

I will add an image to it... Find for both these cases

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find the capacitance

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