try this....capacitance

JEE Mains Guidance › Electricity and magnetism questions › try this....capacitance

An isolated conducting sphere of radius R=6.85cm is given a charge of 1.25nC. What is is the radius R₀ of an imaginary spherical surface such that half of the stored potential energy lies within it ?

#Physics #Electricity and magnetism

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Sharon Amhabjiefbje Sidhusky Please Explain a bit more. This is not very clear.
Upvote·0· Reply ·2014-11-06 19:55:03
Lokesh Verma Testing comment on this website.
Upvote·0· Reply ·2014-11-06 20:20:24
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8 Answers

9

Celestine preetham ·2009-06-30 00:48:19

E ~ 1/C ~ 1/R - 1/RÂ°

now

1/R - 1/RÂ° = 1/2R

RÂ° = 2R

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Sharon Amhabjiefbje Sidhusky This will work, but I have a better answer. Should I post my answer?
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Nitin Ramnath ·2009-06-30 02:02:33

i dint understand the solution. can u explain please?

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9

Celestine preetham ·2009-06-30 05:22:09

E= Q²/2C

Q is conserved

so E is proportional to 1/C

also u need to know formula for C of spherical surfaces

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1

Sharon Amhabjiefbje Sidhusky ·2014-11-06 19:47:31

Yes, Always charge is conserved. And E is proportional to 1/C.

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62

Lokesh Verma ·2014-11-06 20:15:16

Very good question. But try to elaborate a bit.

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Lokesh Verma ·2014-11-06 20:15:46

Very good question. But try to elaborate a bit.

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Lokesh Verma ·2014-11-06 20:17:18

Testing another answer.Testing another answer.Testing another answer.Testing another answer.

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Lokesh Verma ·2014-11-06 20:19:04

Very good question. But try to elaborate a bit.

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Your Answer

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