Q 12-14-103JEE MainJEE Main 2023 (10 Apr, Shift 1)Medium
A zener diode of power rating $1.6$ W is to be used as voltage regulator. If the zener diode has a breakdown of $8$ V and it has to regulate voltage fluctuating between $3$ V and $10$ V, the value of resistance $R_s$ for safe operation of diode will be
Answer: (A) $10\ \Omega$
Maximum safe zener current $=\dfrac{P}{V_z}=\dfrac{1.6}{8}=0.2$ A, reached at the highest input ($10$ V):
$$R_s=\frac{10-8}{0.2}=10\ \Omega$$
Solution by Sreeraj P, M.Sc Physics