Referring to the example combining series and parallel circu

Referring to the example combining series and parallel circuits and the following figure, calculate I_3 (in A) in the following two different ways. (a) from the known values of I = 2.07 A and I_2 = 1.39 A _____ A (b) using Ohm\'s law for R_3 (Assume V_p = 8.90 V.) ____ A In both parts explicitly show how you follow the steps in the Problem-Solving Strategies for series and Parallel Resistors (Submit a file with a

Solution

a)

USING Kirchoff\'s current law

sum of Current passing towards junction = sum of current leaving junction

I = I2 + I3

2.07 = I2+1.39

I2 = 2.07-1.39 = 0.68 A

b) using ohm\'s law

I3 = Vp/R3 = 8.9/13.2 = 0.68 A