2016 Phase II Semiconductor ElectronicsIdeal diodes in a circuit Easy Question 11 of 12 in Semiconductor Electronics

The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance…

The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance $R_1$ will be:
A 1.43 A
B 3.13 A
C 2.5 A
D 10.0 A

The answer is C.

Solution

Reverse-biased branch carries no current.

Current will not flow through $D_1$ as it is reverse biased. Current flows through the cell, $R_1$, $D_2$ and $R_3$.
$\therefore i = \frac{10}{2 + 2} = 2.5$ A

Concept ideal-diode-reverse-biased-branch

Semiconductor Electronics in past papers

12 questions from this chapter have appeared across 3 exam years.