In the circuit of the figure below, the switch is in position A for a long time prior to t=0. (Figure 1)
Part A
Find expressions for v_R(t) if t < 0.
Express your answer in terms of t. Assume t is in seconds.
v_R(t < 0) =
Part B
Find expressions for v_R(t) if t >= 0.
Express your answer in terms of t. Assume t is in seconds.
v_R(t >= 0) =