a. Two solenoids are equal in length and radius, and the cores of both are identical cylinders of iron. However, solenoid A has three times the number of turns per unit length as solenoid B. (a) Which solenoid has the larger self-inductance? (b) What is the ratio of the self-inductance of solenoid A to the self-inductance of solenoid B? b. For the circuit shown in Figure, C= 12.00-F, = 90 V and R = 300 2. Att=0 the switch throw to contact b after having been at contact a for a long time. (a) Find the energy stored in the capacitor before the switch throw is rotated away from contact a. (b) Find the energy stored in the capacitor as a function of time. (c) Sketch a plot of the energy stored in the capacitor versus time t. R R B (a) Original circuit (b) Charging capacitor (b) Discharging capacitor Figure 5 Question 5(b)