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Four charges +5 µC, +6 µC, -3 µC and +2 µC
are located respectively at the corners A, B, C
and D of a rectangle of sides 30 and 40 cm.
(a) Calculate the magnitude and direction of the
net electric field at the centre of the
rectangle.
(b) What will be the net electric force on a
charge +1.5 µC placed at the centre?
29/09/2016
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