1. An ideal battery of 9.0 V is connected to five resistors as shown in figure.
A) What is the equivalent resistance of all the resistors?
B) What is the current through the 10.0 Ω resistor?
C) What is the potential difference between a and b?
2. -Two emfs 6 = 80 V, ; = 50 V are connected to three resistors (20 Q, 30 Q and 40 Q) as shown in figure on the right. Each emf has an internal resistance of r= 1 £2, as noted in the figure. Currents h, 12 and 13 in three branches are marked on the figure for you. Find (a)li, 12 and 1? (in Ampere). (b) the potential difference (in Volt) between points a and b. (When applying Kirchhoff s Loop Rule, please specify which loop is used)