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A coil of resistance 20 Ω and inductance 5 H has been connected to a 100 V battery and the switch is closed at t=0. After how much time will the current acquire half of its steady state value. (ln2=0.693)

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A coil of resistance 20 Ω and inductance 5 H has been connected to a 100 V battery and the switch is closed at t=0. After how much time will the current acquire half of its steady state value. (ln2=0.693)



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