40 In the circuit shown. Initially the capacitor is uncharged. The switch S is closed at time t = 0, then 292 b 4H M 0.5F HE 492 MM 2V S a) b) (Va-Vb) is increasing with time (Va-Vb) is decreasing with time (Va-Vb) = 2V (Va-Vb) = Zero c) d)