[填空题]
Calculate the electric potential due to a dipoleos -lu:g* ,riww,p3 +dvmdg6a whose dipole modf6o/7d cc ;ejment is $ 4.8\times10^{-30 }\,C\cdot m$ at a point $1.1 \times10^{ -9}\,m$ away if this point is
(a) along the axis of the dipole nearer the positive charge; V
(b) 45° above the axis but nearer the positive charge; V
(c) $45^{\circ}\,$ above the axis but nearer the negative charge. V