1. Tardigrade
  2. Question
  3. Physics
  4. The value of power dissipated across the zener diode ( V z=15 V ) connected in the circuit as shown in the figure is x × 10-1 watt. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/12016c511b15990df3442f74cc5dd66b-.png /> The value of x, to the nearest integer, is .

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The value of power dissipated across the zener diode $\left( V _{z}=15\,V \,\right)$ connected in the circuit as shown in the figure is $x \times 10^{-1}$ watt.
image
The value of $x$, to the nearest integer, is ______.

JEE MainJEE Main 2021Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

image
Voltage across $R _{ S }=22-15=7\,V$
Current through $R _{ S }= I =\frac{7}{35}=\frac{1}{5}\,A$
Current through $90 \Omega= I _{2}=\frac{15}{90}=\frac{1}{6}\,A$
Current through $=\frac{1}{5}-\frac{1}{6}=\frac{1}{30}\,A$
Power through zener diode
$P =\,VI$
$P =15 \times \frac{1}{30}=0.5\,watt$
$P =5 \times 10^{-1}$ watt