Moving Charges and Magnetism — Class 12 Physics NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 12 Physics chapter "Moving Charges and Magnetism" — 7 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 12 Physics chapter "Moving Charges and Magnetism" — 7 important questions with detailed answers for CBSE b…
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Key Questions Covered:
- What is magnetic field? State its SI unit and symbol. Write expression for ma…
- Define magnetic force on moving charge. An electron moves with velocity 10⁶ m…
- What is Hall effect? Explain its significance and write Hall coefficient expr…
- + 4 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| What is magnetic field? State its SI unit and symbol. Wri… | ✓ Solved |
| Define magnetic force on moving charge. An electron moves… | ✓ Solved |
| What is Hall effect? Explain its significance and write H… | ✓ Solved |
Showing 3 of 7 questions
Q1: What is magnetic field? State its SI unit and symbol. Write expression for magnetic field due to long straight current-carrying wire.
Magnetic Field (B): Region around magnet or current-carrying conductor where magnetic force is experienced.
SI Unit: Tesla (T) or Weber/m² (Wb/m²)
Symbol: B (vector quantity)
Smaller unit: Gauss (G) where 1 T = 10⁴ G
Magnetic Field due to Long Straight Wire:
B = μ₀I/(2πr)
where μ₀ = 4π × 10⁻⁷ T⋅...
Q2: Define magnetic force on moving charge. An electron moves with velocity 10⁶ m/s perpendicular to magnetic field of 0.5 T. Calculate force on electron.
Magnetic Force on Moving Charge: Force on charged particle moving in magnetic field.
F = qvB sin θ = qv × B (vector form)
where q = charge
v = velocity
B = magnetic field
θ = angle between v and B
SI Unit: Newton (N)
Direction: Given by right-hand rule (for positive charge)
- Point fingers in di...
Q3: What is Hall effect? Explain its significance and write Hall coefficient expression.
Hall Effect: Development of transverse electric field across a conductor carrying current in presence of perpendicular magnetic field.
Mechanism:
1. Current flows through conductor due to drift of charge carriers
2. Perpendicular magnetic field exerts force on moving charges
3. Charges accumulate o...
Showing 3 of 7 questions. Visit the full page for complete solutions.