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Question

Charges q-q and q coulomb are placed at the points (^i+^j+^k),(^i^j+^k) and (^i+^j^k) respectively. The x-component of electric field at the origin will be

A
14πε0.q33
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B
14πε0.2q33
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C
14πε0.q3
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D
None of these
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Solution

The correct option is A 14πε0.q33
Charges qq
q coulomb points (i+j+k), (ij+k), (i+jk) respectively,
charges will be taken =q3
Now, E=1
d=12+12+12=3 unit
E=14πϵ0q33

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