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![[Post New]](/templates/default/images/icon_minipost_new.gif) 19 Jun 2008 05:42:07 IST
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At an altitude of 300m the electric field in the earth atmosphere is 60 V/m and at an altitude of 200m it is 100V/m . Calculate the total amount of charge contained in a cube of side 50 m located between 200m and 300 m altidude . Assume earth's surface to be flat .
Ans 0.88 x 10 exp-6C .
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You have not given the direction of the field. If i assume that the field is downward and also assum that field varies linearly with height. Then there will be a change of 20V/m on difference of height of 50m.
So flux = 20*50*50 =q/epsilon_o
So q - 5*10^3*8.8*10^-12 So answer is 4.4*10^-8 C.
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Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi |
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