Magnetism and Matter — Class 12 Physics NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 12 Physics chapter "Magnetism and Matter" — 6 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 12 Physics chapter "Magnetism and Matter" — 6 important questions with detailed answers for CBSE board exa…
By Syllab.in · Updated
Key Questions Covered:
- Define magnetic susceptibility. Write its relation with relative permeability.
- What is magnetic permeability? Distinguish between μ, μ₀, and μᵣ.
- What are diamagnetic materials? Explain diamagnetism from electronic structur…
- + 3 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| Define magnetic susceptibility. Write its relation with r… | ✓ Solved |
| What is magnetic permeability? Distinguish between μ, μ₀,… | ✓ Solved |
| What are diamagnetic materials? Explain diamagnetism from… | ✓ Solved |
Showing 3 of 6 questions
Q1: Define magnetic susceptibility. Write its relation with relative permeability.
Magnetic Susceptibility (χ_m - chi): Measure of ease with which material gets magnetized.
χ_m = M/H
where M = magnetization (magnetic moment per unit volume)
H = magnetic field intensity
Dimensionless quantity (no units)
Relation with Relative Permeability:
μᵣ = 1 + χ_m
where μᵣ = relative perm...
Q2: What is magnetic permeability? Distinguish between μ, μ₀, and μᵣ.
Magnetic Permeability (μ): Ability of material to support magnetic field.
μ = B/H
where B = magnetic flux density
H = magnetic field intensity
SI Unit: Henry per meter (H/m) or T⋅m/A
Alternatively: T⋅m/A or Wb/(A⋅m)
Three types:
1. Absolute Permeability (μ):
μ = B/H
Dimension: [H/m] or [T⋅m/A]
...
Q3: What are diamagnetic materials? Explain diamagnetism from electronic structure viewpoint.
Diamagnetic Materials: Materials that are weakly repelled by magnetic field.
Characteristics:
- Magnetic susceptibility χ_m < 0 (negative)
- Relative permeability μᵣ < 1 (slightly less than 1)
- |χ_m| very small (typically 10⁻⁵ to 10⁻⁶)
- No permanent magnetic moment
- Induced magnetization o...
Showing 3 of 6 questions. Visit the full page for complete solutions.