20. The circuit below consists of two batteries and three resistors. Find the magnitude and direction of the current through each resistor. RL WW 100 RI V WW 180 20 V R. Va WW 160 12 V 21. Consider the circuit in the diagram. Ra 4.00 Is 8.0 ARI 12 A RI $3.00 RA 60 V 1.09 R WW 4.0 A a) Find the currents Is and I4. b) Find the resistances R2 and R5. 22. The diagram shows a circuit. Each battery in the circuit has an internal resistance. 6.02 9.052 WW $5.00 BI = 24 V B1 = 12 V 1 - 2.00 n = 1.09 E1== 24 V ri = 2.00 4.0 0 8.02 a) Find the magnitudes of the currents I1, Iz and Is shown in the diagram. b) Find the terminal voltage of the 12-V battery