QJEEM24Ph7a9b: JEE Main 2024 Physics - Class 12 JEEM24Ph7a9b Solution: A potential divider circuit is connected with a dc source of ,…

A potential divider circuit is connected with a dc source of $20 \mathrm{~V}$ , a light emitting diode of glow in voltage $1.8 \mathrm{~V}$ and a zener diode of breakdown voltage of $3.2 \mathrm{~V}$ . The length (PR) of the resistive wire is $20 \mathrm{~cm}$ . The minimum length of PQ to just glow the LED is _________ $\mathrm{cm}$ .