Question 144: Semiconductors and Logic Gates

Question

The figure represents a voltage regulator circuit using a Zener diode. The breakdown voltage of the Zener
diode is 6 V and the load resistance is, R
L
= 4k$\Omega $. The series resistance of the circuit is R
i
= 1 k$\Omega $. If the
battery voltage V
B
varies from 8 V to 16 V, what are the minimum and maximum values of the current
through Zener diode?
![](https://imagex.cdn.examgoal.net/3rsa0w2w9jwzguc6e/cb998e85-7959-4c89-a579-e97fd92255d4/43475c60-907e-11e9-86c1-73f7f991b766/file-3rsa0w2w9jwzguc6f.png)

Accepted Answer

V
breakdwon
= 6V, RL = 4k$\Omega $, R
i
= 1 k$\Omega $
${i_L} = {6 \over 4} 	imes {10^{ - 3}} = 1.5 	imes {10^{ - 3}} = 1.5\,mA$
i
i
= 2 ÃÂ 10
Ã¢ÂÂ3
i = i
1
Ã¢ÂÂ i
L
= 0.5 mA Ã¢ÂÂ minimum current
i
i
= 10 ÃÂ 10
Ã¢ÂÂ3
= 10 mA
i
max
= 8.5 mA
![](https://imagex.cdn.examgoal.net/7kejek19ozgxa/9b5bb61f-eaa5-4ba5-b5a4-9a14d08a2b8b/cf08c8e0-e54e-11e9-a7bc-b7b08ce8d541/file-7kejek19ozgxb-443w.jpg)

Answer

0.5 mA; 8.5 mA

Answer

1.5 mA; 8.5 mA

Answer

1 mA; 8.5 mA

Answer

0.5 mA; 6 mA

Semiconductors and Logic Gates

Choose the correct answer: