Zener Diode as Voltage Regulator | JEE Mains 2026 | 23 Jan Shift 1 | Physics Solution скачать в хорошем качестве

Zener Diode as Voltage Regulator | JEE Mains 2026 | 23 Jan Shift 1 | Physics Solution

In this video, we solve a practical Zener diode problem from the JEE Mains 2026 (23 Jan, Shift 1). We calculate the required series resistance ($R_s$) to ensure the diode operates safely while maintaining a regulated voltage. 🚀 Question: The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at $V_z = 5$ V and the desired current in load is 5 mA. The unregulated voltage source can supply up to 25 V. Considering the Zener diode can withstand four times of the load current, the value of resistor $R_s$ (shown in circuit) should be ____ $\Omega$. Options: 1. 1000 2. 4000 3. 100 4. 10 📌 Timestamps: 0:00 - Introduction to Zener Voltage Regulators 0:37 - Determining the voltage drop across the series resistor ($R_s$) 1:05 - Calculating Zener and Load current limits 1:21 - Applying KCL to find the total circuit current 1:32 - Calculating the resistance value using Ohm's Law 1:50 - Why 1000 $\Omega$ is the correct safety choice 2:11 - Detailed explanation: Why 4000 $\Omega$ fails to regulate voltage 3:00 - Final Answer & Option 1 If this helped you unlock the concept, please Like, Share, and Subscribe! #JEEMains2026 #Physics #ZenerDiode #VoltageRegulator #PhysicsUnlocked #Semiconductors #JEEPhysics