Only the positive half the input sinusoidal waveform passed through the load

To calculate the average power absorbed by the load in a half-wave rectifier circuit, we need to determine the average value of the voltage across the load and then use Ohm's law to calculate the power.

The rms value of the sinusoidal source voltage is given as 386 V, which represents the peak value of the voltage. We can calculate the peak value by multiplying the rms value by the square root of 2:

In a half-wave rectifier, only the positive half of the input sinusoidal waveform is passed through to the load. Therefore, the average value of the voltage across the load (Vavg) can be calculated by taking the peak value and dividing it by π:

Vavg = Vp / π

Pavg = (Vavg^2) / R

= (173.86 V) ^2 / 15.2 Ω