Physics Ncert Solutions Class 12th Semiconductor Electronics: Materials, Devices and Class 12th Physics

Drawing power form a 12V car battery, a 9V stabilized DC voltage is required to power a car stereo system, attached to the terminals A and B, as shown in the figure. If a Zener diode with ratings, V_z = 9V and P_max = 0.27 W, is connected as shown in the figure, for the above purpose, the minimum series resistance R_s must be:-

Option 1 - <p>111<span class="mathml" contenteditable="false"> <math> <mrow> <mi>Ω</mi> </mrow> </math> </span></p>

Option 2 - <p>103<span contenteditable="false"> <math> <mrow> <mi>Ω</mi> </mrow> </math> </span></p>

Option 3 - <p>100<span contenteditable="false"> <math> <mrow> <mi>Ω</mi> </mrow> </math> </span></p>

Option 4 - <p>97<span contenteditable="false"> <math> <mrow> <mi>Ω</mi> </mrow> </math> </span></p>

22 Views|Posted a year ago

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Answered by

Vishal Baghel | Contributor-Level 10

a year ago

Correct Option - 3

Detailed Solution:

$i_{m a x} = \frac{P_{m a x}}{V_{z}} = \frac{3}{100}$

$∴ R_{s_{m i n}} = \frac{V_{R_{S}}}{i_{m a x}}$

$= \frac{3}{3 / 100} = 100 Ω$

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Physics Ncert Solutions Class 12th 2026

Physics Ncert Solutions Class 12th 2026

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