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The present analysis has been made to investigate the effects of finite resistivity on the amplification of low frequency plasma waves, e.g. an Alfven wave due to a time dependent modulating magnetic field. It is found that the bandwidth of frequencies for which amplification occurs increases due to finite resistivity. The degree of modulation should exceed a critical value for amplification to occur. The growth rate decreases due to damping. The problem has been solved analytically.

A method of analysing the interactions between three coherent waves in a plasma in the presence of an external stochastic magnetic field is presented. The equations governing the wave-wave interaction are obtained in the binary collision approximation. The interaction between two transverse and one longitudinal wave is presented as an illustration.

In an earlier paper by Mittal and Prahalad, the amplification of Alfven waves in a stochastic magnetic field was investigated. The present analysis gives the effect of the stochastic coupling on Alfven waves. The stochastic differential equation governing the evolution of an Alfven wave is analysed by the method of Stratanovich and Romanovskii (1965).

Aims to study the nature of the instabilities of the neutral sheet in the tail of the magnetosphere.