Magnetism (HSC SSCE Physics): Flashcards

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Modelling Magnetic Fields
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3 types of models for magnetic fields

Conceptual, mathematical, numerical

What field line spacing indicates

Field strength (closer lines = stronger field)

What field line arrows show

Direction of force on north magnetic pole

Why field lines never cross

Only one direction of force at any point

Domains in ferromagnetic materials

Small regions where electrons' magnetic fields align

Equation for BB around straight wire

B=μ0I2πrB = \frac{\mu_0 I}{2\pi r}

Equation for BB inside solenoid

B=μ0NILB = \frac{\mu_0 NI}{L}

Value of μ0\mu_0 (permeability of free space)

4π×10−74\pi \times 10^{-7} T·m/A

Analytical vs numerical solutions

Analytical: solve maths; Numerical: computer calculates values

Wire model limitation

Only accurate for very long wires, not near ends

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Electrostatics

Electric Circuits

Magnetism

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Electrostatics

Electric Circuits

Magnetism

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Electrostatics

Electric Circuits

Magnetism

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