question_answer

In L-R circuit, for the case of increasing current, the magnitude of current can be calculated by using the formula [MP PET 1994]

A)            \[I={{I}_{0}}{{e}^{-Rt/L}}\]     

B)            \[I={{I}_{0}}(1-{{e}^{-Rt/L}})\]

C)            \[I={{I}_{0}}(1-{{e}^{Rt/L}})\]                                           

D)            \[I={{I}_{0}}{{e}^{Rt/L}}\]