표기 H, $\vec{H}$
단위 A/m

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또다른 자기장인 자속밀도 B와의 관계식:
 B=μH
where
 μ : [[투자율,permeability]]
 B : [[자속밀도,magnetic_flux_density]]

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정의:
 $\vec{H}=\frac{1}{\mu} \vec{B}-\vec{M}$
where
 $\vec{H}$ : '''magnetic field strength'''
 $\mu$ : magnetic permeability
 $\vec{B}$ : magnetic flux density
 $\vec{M}$ : [[자화,magnetization]]
([[https://www.britannica.com/science/magnetic-field-strength Britannica]])

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AKA '''자계세기, 자계강도'''
AKA '''magnetic field strength, magnetic intensity'''

Up: [[자기장,magnetic_field]]