1. Complete question 1 from the homework for the tutorial A model for circuits Part 3: Multiple batteries. This homework question is on page 111 of the Tutorials in Introductory Physics Homework book. 2. The switch in the circuit at right has been in position a for a long time. It is changed to position b at t=0 s. a. What is the time constant of this RC circuit? b. What are the charge Q on the capacitor and the current I through the resistor (i) immediately after the switch is closed? (ii) at t = 5 s? (iii) at t = 10 s? 12 V + 50 mF a b 75 www