Question 99: Semiconductors and Logic Gates

Question

In the given figure, each diode has a forward bias resistance of 30$\Omega$ and infinite resistance in reverse bias. The current I
1
will be :
![](https://app-content.cdn.examgoal.net/fly/@width/image/1kwoqyz1q/e2c0cac5-7acb-4be1-b723-ecbe65e92df7/09f880e0-5351-11ec-9cbb-695a838b20fb/file-1kwoqyz1r.png?format=png)

Accepted Answer

As per diagram,
Diode D
1
& D
2
are in forward bias i.e. R = 30$\Omega$ whereas diode D
3
is in reverse bias i.e. R = infinite $\Rightarrow$ Equivalent circuit will be
Applying KVL starting from point A
$ - \left( {{{{I_1}} \over 2}} ight) 	imes 30 - \left( {{{{I_1}} \over 2}} ight) 	imes 130 - {I_1} 	imes 20 + 200 = 0$
$\Rightarrow$ $-$100 I
1
+ 200 = 0
I
1
= 2
Option (c)
![](https://app-content.cdn.examgoal.net/fly/@width/image/1kwor03km/b14fdb20-d893-4504-8980-c04b8ed8698d/29466b60-5351-11ec-9cbb-695a838b20fb/file-1kwor03kn.png?format=png)

Answer

3.75 A

Answer

2.35 A

Answer

2 A

Answer

2.73 A

Semiconductors and Logic Gates

In the given figure, each diode has a forward bias resistance of 30\Omega and infinite resistance in reverse bias. The current I 1 will be :

Choose the correct answer: