An electric dipole is placed at the centre of an imaginary sphere. Which of the following option is/are correct?

 An electric dipole is placed at the centre of an imaginary sphere. Which of the following option is/are correct?

a) The electric field is zero at every point of the sphere
b) The flux of the electric field at every point of the sphere is zero
c) The electric potential is zero at every point of the sphere
d) The electric potential is zero on a circle on the surface

Answer: (b),(d)

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