A charge 10−9C is located at the origin of a coordinate system and another charge Q at (2,0,0). If the x− component of the electric field at (3,1,1) is zero, calculate the value of Q.
A
4.3×10−10C
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B
−2.3×10−10C
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C
−4.3×10−10C
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D
2.3×10−10C
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Solution
The correct option is C−4.3×10−10C
Electric field due to a point charge qi at position →ri in vector form is expressed as →Ei=kqr3i→ri