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An electric dipole has a fixed dipole mo...

An electric dipole has a fixed dipole moment P, which makes angle `theta` with respect to X-axis. When subjected to an electric field `E_(1) = E hat(i)`, it experiences a torque `tau_(1)`. When subjected to another electric field `E_(2) = sqrt(3) E_(1) hat(j)`, it experiences torque `tau_(2) = - tau_(1)`. Then angle `theta` is

A

`60^(@)`

B

`90^(@)`

C

`30^(@)`

D

`45^(@)`

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