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प्रश्न
Energy needed to establish an alternating current I in a coil of self-inductance L is
विकल्प
`L (dI)/(dt)`
`1/2 LI^2`
`1/2 IL^2`
zero
MCQ
उत्तर
`1/2 LI^2`
Explanation:
Inductance L opposes current growth because the work required is `1/2 LI^2`
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