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Problem
Problem
A charge
Q
Q
Q
is placed at each of the two opposite corners of a square. A charge
q
q
q
is placed at each of the other two corners. If the resultant force on each charge
q
q
q
is zero, then (a)
q
=
2
Q
q = \sqrt{2} Q
q
=
2
Q
(b)
q
=
−
2
Q
q = -\sqrt{2} Q
q
=
−
2
Q
(c)
q
=
2
2
Q
q = 2\sqrt{2} Q
q
=
2
2
Q
(d)
q
=
−
2
2
Q
q = -2\sqrt{2} Q
q
=
−
2
2
Q
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