Moving Charges & Magnetism - 5 | Force on Current Carrying Conductors & Galvanometer | CBSE | NCERT

Описание: In this video, we study Force on a Current Carrying Conductor and Magnetic Effects of Current – Class 12 Physics as per the CBSE / NCERT syllabus, with clear theory, diagrams, and exam-oriented explanations.

Topics covered:

• Force on a current carrying conductor in a uniform magnetic field
Direction using Fleming’s Left Hand Rule and factors affecting the force

• Force between two parallel current carrying conductors
Attraction and repulsion, definition of one ampere, and practical significance

• Torque on a rectangular current loop placed in a magnetic field
Conditions for maximum and zero torque, principle of electric motors

• Moving Coil Galvanometer – construction
Uniform radial magnetic field, role of soft iron core, suspension and coil

• Moving Coil Galvanometer – working
Deflection proportional to current, controlling torque and restoring torque

Important formulas used:

Force on current carrying conductor
F = B I l sinθ

Force per unit length between parallel conductors
F / l = (μ0 I1 I2) / (2π d)

Torque on rectangular current loop
τ = N B I A sinθ

Current sensitivity of galvanometer
θ / I = N B A / k

Key concepts explained:

• Interaction of magnetic field and electric current
• Attraction and repulsion of currents
• Principle and use of moving coil galvanometer
• Figure of Merit of a Galvanometer
• Current Sensitivity of Galvanometer
• Voltage Sensitivity of Galvanometer

Useful for:

• Class 12 CBSE & State Board students
• NEET / JEE foundation level
• Board-oriented theory questions and numericals
• Conceptual clarity in magnetism and current electricity

👨‍🏫 Faculty: Sureshkumar
🎓 Qualification: M.Sc. Physics & Electronics
📜 Qualified: TNSET | CTET | TNTET
📱 WhatsApp (Classes & Academic Queries): +91 9047872275
📧 Email: [email protected]