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Three charges each equal to 1muC are pla...

Three charges each equal to `1muC` are placed at the three corners of a square of side 1.0m. Find electric field at the fourth corner.

Text Solution

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`E_(DA)= (k xx 10^(-6))/((1)^(2)) cos 45^(@), E_(DB)= (k xx 10^(-6))/((sqrt2)^(2))`
`E_(DC)= (k xx 10^(-6))/((1)^(2)) cos 45^(@)`
`therefore E_(D)= E_(DA) + E_(DB) + E_(DC)`
`=17.2 xx 10^(3) NC^(-1)`
`45^(@)` with one of the sides at the fourth corner.
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