First slide

Inductance

Question

After how much time energy becomes $\frac{1}{e}$ of the maximum value in a R-L circuit where R = 2 $Ω$ and L = 2mH?

Easy

A

1 ms
B

0.5 ms
C

2 ms
D

1.5 ms

Solution

$t = \frac{L}{R} = \frac{2 x 10^{- 3}}{2} = 1 ms$

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