A coil of inductance 300mH and resistance 2Ω is connected to a source of voltage 2V. The current Reaches half of its steady state value in (approximately) $(l o g_{e} 2 = 0.693)$

0.1 s

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10 s

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7 s

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9 s

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Solution

The correct option is A
0.1 s

$i = i_{0} (1 - e^{\frac{- R t}{L}}) i = \frac{i_{0}}{2}$

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300 mH

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ln 2 = 0.693

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