An experiment is performed to determine the $I-V$ characteristics of a Zener diode, which has a prot

Question

An experiment is performed to determine the $I-V$ characteristics of a Zener diode, which has a protective resistance of $R=100 \Omega$, and a maximum power of dissipation rating of $1 \Omega$. The minimum voltage range of the DC source in the circuit is\

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(b) : Potential drop across zener diode $V_{Z}=V-I R=V-100 I$\ $	herefore \quad$ Power, $P=V_{Z} I_{Z}$ $=(V-100 I) I$\ But $P=1 \mathrm{~W}$ (given)\ $	herefore \quad(V-100 I) I=1$\ or $100 I^{2}-V I+1=0$ For $I$ to be real, $V^{2}-4 	imes 100 	imes 1 \geq 0$ or $V \geq 20 \mathrm{~V}$\