The quantity of self-inductance ($L$) is defined by the relation between magnetic flux ($\Phi_B$) and current ($I$) as $N\Phi_B = LI$.

1. SI Unit: The SI unit of inductance is the henry (symbol H). It is named in honour of Joseph Henry, who discovered electromagnetic induction independently of Faraday .
2. Analysis of other options:

• Farad: The unit of Capacitance .
• Weber: The unit of Magnetic Flux .
• Tesla: The unit of Magnetic Field ($B$) .