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A 20 Henry inductor and coil is connected to a 10 ohm resistance in series as shown in figure. The time at which rated of dissipation of energy (Joule’s heat) across resistance is equal to the rate at which magnetic energy is stored in the inductor, is - E 10 Ω i 20H

1. 2 1 A n 2
2. A n 2
3. 2 A n 2
4. 2 n 2 A

Correct answer: 2 A n 2

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