Velocity selector class 11 |

Описание: In this lecture on PhysicsByDM, we explain the concept of a Velocity Selector in a clear, conceptual, and exam-focused manner according to the latest Class 12 Physics (Electromagnetism) syllabus.
A velocity selector is an important device that uses mutually perpendicular electric and magnetic fields to allow only charged particles of a specific velocity to pass undeflected. This topic plays a key role in understanding charged particle motion, Lorentz force, and applications such as mass spectrometers.
🔹 Topics Covered in This Lecture:
✔ What is a Velocity Selector?
✔ Principle of Velocity Selector
✔ Arrangement of Electric and Magnetic Fields
✔ Force on a Charged Particle (Electric vs Magnetic)
✔ Condition for Zero Deflection (qE = qvB)
✔ Expression for Selected Velocity (v = E / B)
✔ Direction of Forces and Particle Motion
✔ Practical Applications of Velocity Selector
✔ Important Derivations & Exam Tips
✔ Diagram-Based Explanation
🎯 This Lecture is Helpful For:
✅ Class 12 Physics students
✅ FBISE / PECTAA
✅ Pre-Engineering students
✅ Pre-Medical students
✅ Board exams, MCQs & Entry Test preparation
📌 Watch till the end for strong concepts, derivations, and exam-oriented explanations.
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