We investigate the electrical conductance of a homogeneous, weakly turbulent magnetoactive plasma under the assumption that oscillation is possible. Under certain onditions the electrical conductance of such a plasma can be anomalously small. This phenomenon can be explained by an effective increase in the frequency of ion electron collisions that is caused by collective particle interaction. Only low-frequency oscillations (in which both electrons and ions participate) give a significant contribution to turbulent-plasma resistance.A formula was found, through the turbulent oscillation spectrum, for the electrical conductance of the weakly turbulent plasma. Comparison of the conductance with the anomalous diffusions across the magnetic field shows that they both contain the same quantity (determined by the oscillation spectrum), which can be interpreted as an effective collision frequency; hence we draw the conclusion that this effective collision frequency will play the role of ordinary collisions in other macroscopic processes also.The effective collision frequency was evaluated for the Drummond-Rosenbluth instability, and with it we found the width of the weak shock wave in collisionless plasma. Also found was the formula for the effective collision frequency of an isotropic plasma.