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In Fig., the four particles fixed in pal...

In Fig., the four particles fixed in palce and have charges `q_(1) = q_(2) = +5e, q_(3) = +3e` and `q_(4) = -1e`. Distance `d = 8.0 mu m`. What is the magnitude of the net electric field at point P due to the particles ?

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`(1)/(4pi epsilon_(0)) ((12q)/(4d^(2))-(3q)/(d^(2)))hat(j)`
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RESNICK AND HALLIDAY-ELECTRIC CHARGES AND FIELDS-Problems
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