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Physics 2 #3

Two point charges are placed along a horizontal axis with thefollowing values and positions: +3mc at x =0cm, -7mc at x=20cm. Atwhat point along the x-axis is theelectronic field zero?Can someone help me with this?
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Answer #1
Given that thecharges are q1 = + 3*10-3 C and q2 = -7*10-3C--------------------------------------------------------------------Since one chargeis positive andanother is negative, so the net field is zero outside thecharges not in between thecharges .Let the field is zero at the distance d from thecharge q2 then(1/4πεo)q1/(x+d)2 =(1/4πεo)q2/ (d )2q1/(x+d)2= q2/(d)2(x+d)/ d = √q1 /q2d=x / ( √q1/q2 -1 )slove for d
answered by: Jodine
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