Consider two point charges `q_(1)=q_(2)=q(qgt0)` placed in x-y plane at `(0,-R)` and `(R,0)` as shown in the figure. Now charges `q_(2)` starts revolving in anticlockwise sense with uniform angular velocity `omega` in a circle about origin in xy-plane. E is magnitude of net field at origin, V is potential at origin and `E_(x)` is x-component of field at origin then select correct variation of `V,E_(x)` and E with time t.

Options

A.
B.
C.
D.

Answer

C, D

Explanation

`V=(2Kq)/(R)=` constant
`E_(net)=(2Kq)/(r^(2))cos((theta)/(2))`
`E_(net)=(2Kq)/(r^(2))cos((theta)/(2))`
Where `theta` is angle between electric field due to two charges.
`E_(x)=-(Kq)/(R^(2))cosomegat`