This book covers the syllabi of Mathematics prescribed for B.A., B.Sc. (H), M.A. and M.Sc. courses at Indian universities. The stress has been given on fundamental ideas, so that the students may grasp it easily. Each topic has been introduced and developed in as simple and straightforward manner as possible and well within the comprehension of students of all categories. Articles are arranged in a systematic order. Beginning with the study of Attraction of a Rod, the book covers Attraction of Disc at any Point, Attraction of a Spherical Shell and a Solid Sphere, the Potential of a Rod and Circular Disc, Potential of Spherical Shells and Solid Spheres, the Work Done by Mutual Attractive Forces, General Theorems and Equipotential Surfaces. The fundamental principles involved have been amply illustrated by diagrams and worked out examples, so that the students may understand the methods clearly. Most of the questions provided herein have been taken from question papers of various universities. This will definitely facilitate preparation for examinations. While the book is indispensable for the graduate and postgraduate students of Mathematics, it is highly useful for the aspirants of UPSC, State Public Services and other competitive examinations.