Question 238: Semiconductors and Logic Gates

Question

The value of power dissipated across the zener diode (V
z
= 15V) connected in the circuit as shown in the figure is x $	imes$ 10
$-$1
watt.
The value of x, to the nearest integer, is __________.
![](https://imagex.cdn.examgoal.net/1kmilrn9f/076d1327-5861-46c2-a172-635d381d1178/d2deed30-89f5-11eb-9c26-d9a423ffb060/file-1kmilrn9g.jpg)

Accepted Answer

$i = {7 \over {35}} = {1 \over 5}A$
${i_1} = {{15} \over {90}} = {1 \over 6}A$
${i_2} = i - {i_1}$
${i_2} = {1 \over 5} - {1 \over 6}$
${i_2} = {1 \over {30}}A$
Power across diode; P = V
2
i
2
$P = 15 	imes {1 \over {30}}$
P = 0.5 W
$ 	herefore $ P = 5 $	imes$ 10
$-$1
W
![](https://imagex.cdn.examgoal.net/1kpcltuw4/0040f90e-36b4-426d-ad37-a1b6f278dd59/029fa640-c20e-11eb-afb1-cd99dd31b562/file-1kpcltuw5.jpg)

Semiconductors and Logic Gates

The value of power dissipated across the zener diode (V z = 15V) connected in the circuit as shown in the figure is x \times 10 -1 watt. The value of x, to the nearest integer, is __________.

Integer / Numeric Answer Type