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What inductance would be needed to store...

What inductance would be needed to store `1.0 kWh` of energy in a coil carrying a `200 A` current. `(1kWh=3.6xx10^6J)`

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We have `i=200A`
and `U=1kWh=3.6xx10^6J`
`:. L=(2U)/i^2 (U=1/2Li^2)`
`=(2(3.6xx10^6))/((200)^2)=180H`
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