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A solenoid of resistance 50 Omega and in...

A solenoid of resistance `50 Omega` and inductance `80` Henry is connected to a `200 V` battery.How long will the current take to reach `50%` of its final equilibrium value?Calculate the maximum energy stored.

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The correct Answer is:
`(L//R) In 2=1.109s, 640J`
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