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//chapter23
//example23.6
//page515
Vm=240 // V
v=180 // V
// figure given is for understanding purpose only. It is not required to solve the example
// SCR remains off till it reaches 180 V i.e. forward breakdown voltage
// since v=Vm*sin(theta), we get
theta=asin(v/Vm) // firing angle in terms of degrees
// since theta=314*t, we get
t=theta/314 // seconds
printf("off duration of SCR = %.3f ms \n",t*1000) //multiply t by 1000 to display time in milliseconds
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