http://www.circuitstoday.com/half-wave-rectifiers
*(ii)**Disadvantages:1.* The output current in the load contains,* in addition to dc component*, *ac components of basic frequency equal to that of the input voltage frequency*. Ripple factor is high and an elaborate filtering is, therefore, required to give steady dc output. *(iii)*2.The power output and, therefore, rectification efficiency is quite low. This is due to the fact that power is delivered only half the time. *(iv)*3.Transformer utilization factor is low. *(v)*4.*DC saturation of transformer core resulting in magnetizing current and hysteresis losses and generation of harmonics.* transformer are not perfect and saturation solve the DC component problem. 2013/5/27 David Roberson <dlrober...@aol.com> > The concept mentioned below by Duncan is not correct. The DC current > that flows into the resistor from the wall socket finds a short circuit to > ground in the power transformer center tap in most cases. > >
