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Hatshy [7]
4 years ago
10

How long does it take for the current in an rl circuit with r = 140 ? and l = 69 mh to reach half its final value?

Physics
1 answer:
Leno4ka [110]4 years ago
3 0
I = \frac{V}{R} (1 - e^{- \frac{R}{L}t } )

For the current to reach half its final value:

e^{- \frac{R}{L}t } = 0.5
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