Question

The energy stored in the inductor long time after switch S is closed is (steady state)

• A. $\frac{L{ϵ}^2}{R}$
• B. $Zero$
• C. $\frac{L{ϵ}^2}{2R^2}$
• D. $\frac{L{ϵ}^2}{4R^2}$

Answer 1

Answer: (C)

$U=\frac{1}{2}L$ ${\left(\frac{\epsilon }{R}\right)}^2$