QJEEM19Ph4e23: JEE Main 2019 Physics - Class 12 JEEM19Ph4e23 Solution: Ge and Si diodes start conducting at 0.3 V and 0.7 V…

Case 1 :

Ge need 0.3 V for start conducting and Si need 0.7 V for start conducting.

So, conduction will be start by Ge.

Out of 12 V, 0.3V will be consumed by Ge.

$\therefore$   V₀₁ = 12 $-$ 0.3 = 11.7 V

Case 2 :

Here as Ge diode is in reverse bias so no conduction will happen through Ge diode

As Si diode is in forward bias so conduction will happen through Si diode.

Here Si diode consume 0.7 V.

So, V₀₂ = 12 $-$ 0.7 = 11.3 V

$\therefore$   Value of V₀ changes by

= 11.7 $-$ 11.3 = 0.4 V