show an electric dipole formed by two . particles fixed at the ends of a light rod of length l. The

show an electric dipole formed by two . particles fixed at the ends of a light rod of length l. The . mass of each particle is m and the charges are -q and . +q . The system is placed in such a way that the dipole . axis is parallel to a uniform electric field E that exist . in the region. The dipole is slightly rotated abut its . centre and released. Show that for small angular . desplacement, the motin is anguler sumple harmonic . and find its time period.