90% Students Get This Wrong: Dielectric & Battery |Lec-03| MDCAT & ECAT Physics

*🔥 90% of MDCAT & ECAT students confuse this!* If you think inserting a dielectric always increases the energy of a capacitor, you are **WRONG**! The behavior completely flips depending on whether the battery is *connected* or **disconnected**. In *Lecture 03* of our Physics Prep Series, we break down this exact misconception step-by-step. We’ll analyze how *Charge (Q), Capacitance (C), Voltage (V), Electric Field (E), and Energy (U)* change in both scenarios with clear numerical examples. Whether you are preparing for **NET, ECAT, MDCAT, or NUST**, this is a guaranteed MCQ topic that repeats every year! --- 📖 What you will learn in this video: ✅ *Case 1:* Effect of dielectric when the *battery remains connected* (V = constant) → Charge increases, Electric field remains constant, Energy**INCREASES**. ✅ *Case 2:* Effect of dielectric when the *battery is disconnected* (Q= constant) → Charge remains constant, Electric field reduces, Energy**DECREASES**. Why watch this lecture? Specifically designed for **MDCAT, ECAT, NET, and NUST entry tests**. Covers theoretical concepts + quick problem-solving tricks. Taught in a hybrid language (Urdu/English) for maximum clarity. --- 🔔 Don't forget to: 👍 *LIKE* this video if you found it helpful! 💬 *COMMENT* "Table Saved" if you want more cheat sheets! 🔗 *SHARE* with your fellow aspirants. ✅ *SUBSCRIBE* and hit the bell icon for more MDCAT/ECAT Physics lectures! #MDCATPhysics #ECATPhysics #Dielectric #Capacitor #NETPhysics #NUST #PhysicsMCQs #EntryTestPrep #Electrostatics #DielectricInCapacitor #PhysicsLecture #MDCAT2026 #ECAT2026