How Does Reversing the Diode Affect a Half-Wave Rectifier Circuit?

[sumtingwong]

Homework Statement

Given a Half wave rectifier circuit with the diode reversed . Vs is a sinusoid with 12 V peak , R = 1.5 ohms Vd = 0.7 V
find the average Value of Vo , and the PIV of the Diode .

Homework Equations

average Value of Vo = (1/pi)Vs - (Vd/2)

The Attempt at a Solution

i calculated Vo for circuit and got Vo = (0.7 + Vs) for Vs < -0.7 and Vo = 0 for Vs > -0.7
now i have no idea how to calculate the average value, the equation stated above was just given in the textbook with no explanation as to how they got it, but i did take an educated guess and said Vo,avg = (1/pi)Vs + (Vd/2), also i said that PIV = -Vs since this rectifier rectifies only the negative part of the input sinusoid. am i on the right track ? thanks in advance for your help

 

[sumtingwong]

no one wants to help?