Electricity & Magnetism

Magnetic Field (Solenoid)

B = μ_{0} n I

Uniform magnetic field inside ideal solenoid.

Variables

B

Magnetic field

Field inside solenoid

T

μ₀

Permeability

4π×10⁻⁷

H/m

n

Turn density

Turns per unit length

1/m

I

Current

Current in solenoid

A

Derivation

From Ampere's law with rectangular path.

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