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 :

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)

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: