Question

Assuming the diodes to be of silicon with forward resistance zero, the current $I$ in the following circuit is.

• A. $0$
• B. $9.65mA$
• C. $10mA$
• D. $10.36mA$

Answer 1

Answer: (C)

$10mA$

Here, the diodes are with zero forward resistance. Therefore, the resistance of the circuit will be only $\text{R}=2k\Omega =2\times {10}^3\Omega$

And, the voltage will be $\text{V = 20 Volt}$

As per ohm’s law,

$\text{V = I}\text{.R}$

$\text{I =}\frac{\text{V}}{\text{R}}=\frac{20}{2\times {10}^3}=10\times {10}^{-3}A=10mA$