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December 18, 2014

Homework Help: physics

Posted by ashley --- HELP PLEASEE!!! on Wednesday, May 11, 2011 at 8:22pm.

Two point charges +4q and +q are placed 30 cm apart. At what point on the line joining them is the electric field zero?
(a) 15 cm from charge 4q
(b) 20 cm from charge 4q
(c) 7.5 cm from charge q
(d) 5 cm from charge q

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