Questions in Electrostatics

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	When an electric dipole $\overrightarrow P$ is placed in a uniform electric field $\overrightarrow E $ then at what angle between $\overrightarrow P $ and $\overrightarrow E $ the value of torque will be maximum
	Two charges $ + 3.2 \times {10^{ - 19}}C$ and $ - 3.2 \times {10^{ - 9}}C$ kept $2.4 \AA$ apart forms a dipole. If it is kept in uniform electric field of intensity $4 \times {10^5}volt/m$ then what will be its electrical energy in equilibrium
	What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line
	The electric field due to an electric dipole at a distance r from its centre in axial position is E. If the dipole is rotated through an angle of ${90^o}$ about its perpendicular axis, the electric field at the same point will be