PHY 2049 Midterm: University of Florida PHY 2049 exam2_sol
Document Summary
Oct. 20, 2003: two 12 v batteries, a and b, are connected in series. Battery a has an internal resistance of 1. 0 and battery b has an internal resistance of 0. 5 . Solution: when batteries are put in series, the equivalent emf is the sum of the voltages and the total resistance is the sum of the individual resistances. The magnitude of the eld b at the center of the circle is: Solution: the total eld is the sum of the eld from the in nite wire and the circle. Taking into account the fact that the elds are in the same direction, we obtain b = 0i/2 r + 0i/2r = 0i( + 1)/2 r: two currents, ow at right angles as shown in the gure. Solution: applying the right hand rule for the eld from a, we see that it is going into the page at location b.
