Question 112: Semiconductors and Logic Gates

Question

For the circuit shown below, calculate the value of I
z
:

Accepted Answer

Consider the given figure and draw the direction of current as follows
Here, current I is flowing through resistance R
s
and I
1
is the current flowing through R = 2000 $$\Omega$$
$$	herefore$$ Current, $$I = {{{V_i} - {V_z}} \over {{R_s}}} \Rightarrow I = {{100 - 50} \over {1000}}$$
= 50 mA .... (i)
[$$\because$$ Resistance and Zener diode are in parallel, therefore voltages across them are same]
and current, $${I_1} = {{50} \over {2000}} = 25$$ mA .... (ii)
By using Kirchhoff's current law,
$$\because$$ I = I
1
+ I
z
$$\Rightarrow$$ I
z
= I $$-$$ I
1
..... (iii)
From Eq. (i) and (ii) and, we get
$$\Rightarrow$$ I
z
= (50 $$-$$ 25) mA
I
z
= 25 mA

Answer

25 mA

Answer

0.1 A

Answer

0.15 A

Answer

0.05 A

Semiconductors and Logic Gates

For the circuit shown below, calculate the value of I z :

Choose the correct answer: