question_answer

Assume that each diode as shown in the figure has a forward bias resistance of \[50\Omega \]and an infinite reverse bias resistance. The current through the resistance \[150\,\Omega \]is

A)  0.66 A  

B)  0.05 A  

C)  zero    

D)  0.04 A

Correct Answer: D

Solution :

 The circuit is As the lower diode attached to \[100\,\Omega \] resistance is in reversed biased so, it is non-conducting. Now, the circuit can be redrawn as, \[\therefore \] Current through the circuit, \[I=\frac{V}{R}\] \[=\frac{10}{250}=0.04\,A\]