Question

A charge + Q fixed on the Y axis at a distance of 1m from the origin and
another charge +2Q is fixed on the X axis at a distance of
$\sqrt{2}$
m from the
origin .A third charge - Q is placed at the origin. What is the angle at
which it moves?
​

Answer 1

Answer:

the value of cos(theta) will be

a/(a^2+y^2)^(1/2)

and, the exponent of

a^2+y^2

will be 3/2 instead of 2

otherwise, the answer is dimensionally incorrect