You Need an Inductor That Will Store $20 \mathrm {~J}$ Of Energy When A

Multiple Choice

You need an inductor that will store $20 \mathrm {~J}$ of energy when a $3.0$ -A current flows through it. What should be its self-inductance?

A) $90 \mathrm { H }$
B) $60 \mathrm { H }$
C) $4.4 \mathrm { H }$
D) $3.7 \mathrm { H }$