Question

In $L-R$ circuit, for the case of increasing current, the magnitude of current can be calculated by using the formula

• A. $I=I_{0} e^{-R t / L}$
• B. $I = I _{0}\left(1- e ^{- Rt / L }\right)$
• C. $I = I _{0}\left(1- e ^{ Rt / L }\right)$
• D. $I=I_{0} e^{R t / L}$

Answer 1

Answer: (B)

In $L - R$ circuit when current increases we have $I=I_{0}\left(1-e^{-R t / L}\right)$