`Ge` and `Si` diodes conduct at `0.3 V` and `0.7 V` respectively. In the following figure if `Ge` diode connection are reversed, the value of `V_(0)` changes by

Options

A. 0.2 V
B. 0.4 V
C. 0.6 V
D. 0.8 V

Answer

B

Explanation

Before Ge diode reversed, Ge diode conduct
`V_(0)=12-0.3=11.7V`
After Ge diode reversed, Si diode conduct
`V_(0)^(')=12-0.7=11.3V`
`Delta V_(0)=V_(0)-V_(0)^(') =11.7-11.3=0.4V`