Question

charges each 'q' are kept at point (a,0)and(0,a) find electric field at origin​

Answer 1

Answer:

Fnet=2Fcosθ=2(a2+y2)2k⋅q⋅q/2⋅a2+y2y=(a2+y2)3/2kq2y

As y<<a we write

Fnet=(a3)kq2y

i.e. F∝y

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