[填空题]
Calculate the electric potential due t;lk gnliuh .;35wt3 fxo a dipogd/6 t7d6k ewq pcch,5le whose dipole moment 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