We have investigated the electrical transport properties of Dirac electronsin a monolayer graphene sheet in the presence of both electric and magneticmodulations. The effects of the modulations on quantum transport when they arein phase and out of phase are considered. We present the energy spectrum andthe bandwidth of the Dirac electrons in the presence of both the modulations.We determine the $\sigma_{yy}$ component of the magnetoconductivity tensor forthis system which is shown to exhibit Weiss oscillations.Asymptotic expressionsfor $\sigma_{yy}$ are also calculated to better illustrate the effects ofin-phase and out-of-phase modulations.We find that the position of theoscillations in magnetoconductivity depends on the relative strength of the twomodulations. When the two modulations are out-of-phase there is completesuppression of Weiss oscillations for particular relative strength of themodulations.
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