londoncricket
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Hi all,

I came across this question whilst doing some homework on capacitors and I could not answer it, despite using the hint. Can someone help me please?

Question
Estimate the capacitance and energy stored in a typical thundercloud.Hint: model the thundercloud and the Earth as a parallel plate capacitor.

Thank you!
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Joinedup
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Have you tried estimating the area of the base of a thundercloud - these are also known as cumulonimbus clouds http://www.metoffice.gov.uk/learning...s/cumulonimbus

If you live in the UK you'll have seen a lot of these, might be considered an unfair question to ask people from very dry countries I suppose.
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londoncricket
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(Original post by Joinedup)
Have you tried estimating the area of the base of a thundercloud - these are also known as cumulonimbus clouds http://www.metoffice.gov.uk/learning...s/cumulonimbus

If you live in the UK you'll have seen a lot of these, might be considered an unfair question to ask people from very dry countries I suppose.
I live in the UK.

Would 100m^2 be unreasonable, if it were to be 25m*4m?
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Good bloke
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(Original post by londoncricket)
I live in the UK.

Would 100m^2 be unreasonable, if it were to be 25m*4m?
These clouds are usually several miles across. You need to think town-sized at least rather than garden-sized.
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Joinedup
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I was guesstimating the base area was between 1km x 1km and 3km x 3km square i.e. 1 x 10^6 to 9 x 10^6 m2

These are the giant, as seen from orbit by ISS astronaut size cloud type.
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