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+//chapter 2:THE DEVICE//
+//Example 2.7//problem2.3//
+ Vpiv=1350;//peak inverse voltage in volts//
+ V=415;//main supply in volts//
+ Vf=Vpiv/(sqrt(2)*V);//voltage safety factor//
+printf('value of voltage safety factor=%fv',Vf);
+\ No newline at end of file