First slide

Diodes

Question

In the given circuit, the equivalent resistance between A & B is ( if A has negative potential and B has positive potential)

Moderate

A

$\frac{71}{6} Ω$
B

$\frac{34}{3} Ω$
C

$10 Ω$
D

$8 Ω$

Solution

$\Rightarrow$ -Ve polarity reaches to P side of $D_{1}$ , then $D_{1}$ diode is in Reverse bias
$\Rightarrow$ +Ve polarity reaches to P side of $D_{2}$ , Then $D_{2}$ diode is in forward bias

$R_{2}, R_{3}$ are in series
   $R_{23} = R_{2} + R_{3} = 6 + 8 = 14 Ω$
$R_{23}, R_{4}$ are in parallel    $R_{234} = \frac{R_{23} \times R_{4}}{R_{23} + R_{4}}$
   $R_{234} = \frac{14 \times 10}{14 + 10} = \frac{140}{24} = \frac{35}{6}$
$R_{1} & R_{234}$ are in series    $R_{234} = R_{1} + R_{234}$
$R_{1234} = 6 + \frac{35}{6} = \frac{36 + 35}{6} = \frac{71}{6}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App