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Point charges of 10nC,20nCand10nC arekept at the corners A,B C of a square ABCD of side 3m. Calculate the magnitude of the resultant electric intensity at D. |
Answer» SOLUTION : Electric intensity , `E=(1)/(4piepsilon_(0))(q)/(d^(2))` Here `E_(A)=E_(C)=9xx10^(9)xx10xx10^(-9)//9` `=10NC^(-1)` `E_(B)=(9xx10^(9)xx20xx10^(9))/((3sqrt(2))^(2))` `=10N//C^(-1)` Resultant of `E_(A)&E_(C)`is `(SQRT(2)xxE_(A))=10sqrt(2)` `E_(B)`is ALONG `sqrt(2)xxE_(A)` Resultant electric intensity at D is equal to `(sqrt(2)xxE_(A))+E_(B)=10+10sqrt(2)` `24.14NC^(-1)` |
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