[填空题]
Calculate the electric potential due to a di f v*noco5j.dqvn6si xm/h)15pole w pg0eyd23 n- vn47txzqhose 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