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In this note the axially symmetric metric for stationary gravitational field, in a slightly general form, is discussed. The vacuum field equations for this metric are given. Specialization of this metric leads to a different form of field equations previously discussed in literature. In particular, the Kerr metric is given in a new form. A justification for interpreting the Kerr metric as an exterior solution corresponding to a spinning rod or a rotating spherical body is given.

A complex motion and complex momentum due to relativistic phenomenon has been deduced in this paper. This procedure leads to explain the generation of a field which is the result of energy momentum complexity (tensor). In this work, a form of complex momentum of photon has been derived. This momentum reveals the construction of electromagnetic field. These procedures have been applied to explain the electromagnetic field of fundamental charged particle and leads to the assumption of fundamental charge. In this works trial would be made to derive a relation between gravitational field and electromagnetic field.

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The nonstatic Einstein-Maxwell equations with incoherent matter as source are investigated with a view towards discussing the role of electrical forces during the collapse of a spherical body. It has been shown that the system does not admit nonstatic solutions with isotropic collapse. An expression for the ratio of mass and charge densities is obtained which is found to depend on three arbitrary functions of the radial coordinate. The signiticance of these arbitrary functions in terms of the physical variables of the system is given. The results are then applied to the case of uniformly charged dust models, and a nonexistence theorem for obtaining a class of solutions is derived.