Magnetism — Class 11 Maharashtra HSC Physics revision notes
A 4-page visual revision sheet for Magnetism, written for Class 11 Maharashtra HSC Physics. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
Page 1 as PDF
Magnetism in one look
the bar magnet, the electrostatic analogy and the Earth's own field
Facts about magnets
- every magnet has two poles, north and south, whatever its size or shape
- like poles repel, unlike poles attract
- a freely suspended magnet settles along the geographic N-S direction
- magnetic lines form closed loops: N to S outside, S to N inside the magnet
- unlike an electric dipole, whose field lines start and end on charge
Cut a magnet: no lone pole
- cut a magnet into pieces: each piece is its own weaker magnet, both poles again
- an isolated magnetic monopole has never been found
The bar magnet as a dipole
- pole strength
± q_m, at the N and S poles - magnetic dipole moment
m = q_m(2l), from S to N - magnetic length
2l = 5/6timesgeometric length - magnetic flux density
B = φ/A, unit tesla (Wb m^-2)
Page 1 of 4. The full sheet, all 4 pages, opens free in the app.
What this Magnetism sheet covers
- magnetic pole
- magnetic monopole
- Facts about magnets
- Cut a magnet: no lone pole
- magnetic dipole moment
- The bar magnet as a dipole
- pole strength
- magnetic length
- magnetic flux density
- The electrostatic analogy
- Electrostatics
- Magnetism
- Field at an arbitrary point
- Field at an arbitrary point, far away (r much greater than l)
- axial component
- equatorial component
- resultant magnitude
- gauss's law for magnetism
- angle of dip
- magnetic declination
- Earth's magnetism
- Meridians, declination and dip
- Resolving the Earth's field
- horizontal component
- vertical component
- resultant field
- Special cases of the dip
- Symbols
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Physics chapter by chapter against your real exam dates and free hours, and when the plan reaches Magnetism the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.