Magnetism — Formula Sheet
Maharashtra Board · Class 11 · Physics
5 formulas from Magnetism (Maharashtra Board Class 11 Physics) on one page, grouped by topic. Part of the Maharashtra Board Class 11 Physics syllabus.
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Formulas and Key Relations
Bar Magnet as Magnetic Dipole
Magnetic dipole moment
m = qₘ × 2l (vector from S to N pole)
Magnetic Field Due to Bar Magnet
Equatorial field (perpendicular to axis)
Bₑq = -(μ₀/4π) × (m/r³) for r >> l
Gauss's Law for Magnetism
Net magnetic flux through any closed surface is always zero
∮B·dS = 0
Key relations
For a short bar magnet
Axial field Ba = (μ₀/4π) × (2m/r³), Equatorial field Beq = (μ₀/4π) × (m/r³).
The net magnetic flux through any closed surface is zero
∮B⋅dS = 0.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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