(nm03) 磁場 Magnetic Field (II)


Key Points: Long Range Forces → Fields

Field TypeInvolving...Solving...Units
重力
Gravitational
群眾互動
Interaction of Masses
Σ M → G → m $$ \left [{N \over kg} \right ] = \left [{m \over s^2} \right ] $$
電力
Electric
電荷互動
Interaction of Charges
Σ Q → E → q $$ \left [{N \over C} \right ] = \left [{V \over m} \right ] $$
磁力
Magnetic
運動電荷互動
Interaction of Moving Charges
ΣI=Σ(Q/t)
→ B → i=q/t
$$ \left [ T \right ] = \left [{N \over C} {s \over m} \right ] $$

Magnetic Properties of Matter


Atomic Magnets → nowhere
Electron Spin → ferromagnetic materials

104 Finish Previous lecture (from slide (103-2) from 44 Biot-Savart Law)


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