A) \[+670\,\,kC\]
B) \[-670\,\,kC\]
C) \[-680\,\,kC\]
D) \[+680\,\,kC\]
Correct Answer: C
Solution :
[c] Given, Electric field E=150 N/C Total surface charge carried by earth q =? or, \[q={{\in }_{0}}\]E A \[={{\in }_{0}}E\,\pi \,{{r}^{2}}.\] \[=8.85\times {{10}^{-12}}\times 150\times {{(6.37\times {{10}^{6}})}^{2}}.\] \[\simeq 680\,KC\] As electric field directed inward hence \[q=-680\,kC\]You need to login to perform this action.
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