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Formula Sheet

Magnetic Field and Earth's Magnetism

ICSE · Class 12 · Physics

All formulas from Magnetic Field and Earth's Magnetism in ICSE Class 12 Physics. Key equations, constants, and identities for board exam preparation.

43 questions32 flashcards5 concepts

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19 Formulas · 4 Sections

Formulas

1. Current Loop as a Magnetic Dipole

τ = IAB sinθ

m = IA

m→ = I A→

m→ = NIA→

τ→ = m→ × B→

2. Revolving Electron, Gyromagnetic Ratio, and Bohr Magneton

I = e/T = ev/(2πr)

A = πr²

m = IA = evr/2

J = mevr

m/J = e/(2me)

3. Magnetic Field of a Bar Magnet

B = (μ0/4π) × [2mr/(r² - l²)²]

B = (μ0/4π) × (2m/r³)

B = (μ0/4π) × [m/(r² + l²)^(3/2)]

B = (μ0/4π) × (m/r³)

4. Torque and Potential Energy of a Magnetic Dipole

τ = mB sinθ

τmax = mB

m = τmax/B

U = mB(cosθ1 - cosθ2)

Uθ = -mBcosθ

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Frequently Asked Questions

What are the important topics in Magnetic Field and Earth's Magnetism for ICSE Class 12 Physics?
Key topics in Magnetic Field and Earth's Magnetism include Magnetic Field and Earth's Magnetism - Concept Hierarchy, Mind map showing the main topics and subtopics of the chapter, organized hierarchically to show relationships between concepts., Flowchart showing the comparison between electric and magnetic dipoles, and the derivation of magnetic dipole moment with the right-hand rule.. These are the concepts ICSE Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in Magnetic Field and Earth's Magnetism — ICSE Class 12 Physics?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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