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Four charges are placed on corners of a square having sides of 5 cm.if Q is one micro coulumb,tjen electric feild intensity at cente will be??
Electric field intensity at centre due to charge Q having Q at opposite corner will be cancelled by electric field intensity of that opposite charge.And electric field intensity of opposite Q and -2Q are in same direction.distance between centre and charge Q = disstance between centre and charge -2Q = (5(21/2)/2)*10-2mr =3.54*10-2mSo net electric field at centreE=3KQ/r2putting values of K Q and rE = 0.215 N/C.Hope it clears.
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