Скачать или смотреть NCERT Class 12 Physics Ch-3 | Q3.8 Battery Charging Explained | EMF & Internal Resistance Concept

📘 Topic: NCERT Class 12 Physics Chapter 3 – Current Electricity
🧩 Question 3.8:
A storage battery of emf 8.0 V and internal resistance 0.5 Ω is being charged by a 120 V DC supply using an external series resistor of 15.5 Ω.
Find the terminal voltage of the battery during charging and explain the purpose of the external resistor.

⚡ Concepts Covered in This Video:

1️⃣ EMF and internal resistance of a battery
2️⃣ Charging vs. discharging condition
3️⃣ Use of external resistor during battery charging
4️⃣ Terminal voltage during charging process

✅ Answer:

Terminal voltage = 11.5 V

Purpose of resistor: To limit the charging current and prevent damage or overheating of the battery.

🎯 What You’ll Learn in This Video:
✔️ Concept of EMF & terminal voltage
✔️ Charging vs. discharging of batteries
✔️ How resistors protect electrical devices
✔️ Class 12 NCERT most important numerical for Boards, JEE, NEET

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